remove and/or stop making unfun killer designs

What I think this comment illustrates is that "anti-loop" is a term people seem to use for wildly different things.

Here you're using it to refer to a damaging attack that would be used at a loop, right? Something like a Wesker dash, or a Nemesis Tentacle Strike, things like that?

Whereas a lot of other people (including in this thread) use it to refer to things put down at a loop to pressure survivors away, like a Skull Merchant drone or an Artist idle crow.

It's one of those terms I think everyone has to define as they're using it or these kinds of conversations become talking past one another real quick.

People definitely seem to have conflicting opinions on what counts as anti-loop. Is any killer that has a power that makes running around in a circle more dangerous considered an "anti-loop killer"? Because if so then we're putting Skull Merchant in the same boat as Clown.

It is what the Freddy mains deserve.

May I ask if you've ever played as these killers, and if so what is your play experience is as them?

Apart from Skull Merchant, people don't mass DC against these other killers. I've also never seen anyone brag about making survivors DC'ing here. Fun is highly subjective, and fun-to-go-against even more so. In general, though, I've seen very few people outright say these killers are unfun to go against, aside from Twins, Knight, and SM.

Almost all of these killers, apart from Knight and Skull Merchant require varying levels of skill to use effectively. Trickster requires a lot of skill to be able to hit survivors with successive knife hits to get the injury and down. Twins are often described as being clunky to play as and often require the player to heavily rely on slugging a large number of people, which is high-risk high-reward. Xeno also requires skill to aim the tail and know when to use it, not to mention using the tunnels to patrol the map effectively. Pinhead needs to learn how to both get the portal to open in the right place and get it to hit the survivor, and on top of that he needs to play a macro game to keep survivors off the box. Artist requires players to make accurate placements to gut up close injuries, and proper reads to hit bird snipes. Dredge has to play around locker spawns and loops because he's an M1 killer. Singularity requires a lot of game sense, knowledge of the macro-game, and quick response times to maintain map pressure.

If these killers get you with their power, it's because they outplayed you, not because they were using "God Mode."

Killers don't play four 1v1's. They play a 4v1. They need to be able to down survivors quickly so they can move on to the next one, and powers that allow them to do so are a part of the game.

Edit: Edited for clarity.

Which killers are you referring to, though?

Every killer in the game has some level of counterplay, you'll need to be more specific before people know what you're talking about.

Some of those are among the most counterable killers in the game, though, and some of them don't even have a loop power to begin with- like Sadako.

What makes them killers that make looping obsolete?

You can counter all of these killers with some knowledge of how their powers work. Here's some tips against them.

Xeno can traverse the map quickly, but it still has to catch you. Use turret motion trackers to determine if it's nearby. It's power requires skill to aim, so you can use fakeouts to try and bait it into tail striking at an area you're not heading towards. Also, run to areas with turrets, as those will either divert its attention or break it out of power completely. If it decides to go back into the tunnels, then it's dropped chase and you can get away.

Chucky only gets one dash per power activation. If his first hit is a dash, then he's probably lost power, and you can loop him like a normal killer for the duration of his cooldown. If you're already injured, then that's unfortunate. My advice for avoiding free hits from Chucky is to check the source of every scamper sound around you. You'll be safer that way, and could probably escape from him with the speed boost if he does hit you.

Singularity has to tag you and fully lock on to teleport. That, or he has to use his pod gun. He only has bonus speed if he uses a specific purple rarity add-on. To avoid getting a teleport, grab EMPs from crates. They automatically print them for you. If you get tagged, then immediately using the EMP should get rid of the tracker and disable the pod, allowing you to make distance. The best defense against Singularity is to try to have an EMP ready as often as possible. If he does teleport to you, greed pallets and never drop them. Even if he gets a hit, the pallets are saved for later. If you do want to drop them, then predrop. He'll still break them quickly, but you'll be able to make some distance.

Skull Merchant: Wait for her drones to enter their passive scanning mode. You can hack them to disable them for a while.

Two of Knight's guards run slower than you, so you can always outrun them if you keep running. They all drop a banner where they see you, and that banner becomes available to collect when the horn sounds. If you can find a way to path back to the banner, then you can end the hunt early. The guard AI is really dumb, so you can fakeout at windows and they'll fall for it. If the Knight is chasing you as well, then he loses collision. You can run right through him, perhaps even back to the banner. You can also bait him into hitting you to avoid the two-tap.

For Artist, Pyramid Head, and Nemesis, look behind at them when they're chasing you. You should be able to tell when they're going to use their power and bait them. Artist and Pyramid Head can be baited into special attacking, which slows them down and puts their power on cooldown. Nemesis suffers a movement speed penalty for missing. You can use your mindgames to make distance, possibly to another loop.

Trickster needs to hit you several times (ten?) to injure you. You can make vaults even if he hits you with knives because he'll probably only get a couple hits if he's accurate. If he uses main event, jump in a locker. He'll either have to burn the whole thing hitting a wall, or cancel. If he cancels, he makes a groaning noise, which is your cue to get out of the locker and run.

Hopefully these tips help.

Edit: Clarified description of Chucky's power and added a couple Singularity tips.