Help with a no ruin Pig perk build

I would rather go with Whispers or Enduring instead of bloodhound cause as the pig you don't need that much tracking.

Personally, I would take off Thanataphobia. It's not a great perk to begin with, even to slow down the game, and Pig doesn't have the ability to injure multiple people in quick succession, unless you happen to catch a couple together at the same time. If you aren't going to use Ruin to slow survivor momentum, then you don't want poor substitutes, but either something to speed up your ability to take momentum away, or something to make their momentum work in your favor.

For those reasons, I'd recommend either an insta-build: Make Your Choice and Devour Hope, mixed with chase ending perks like Spirit Fury and Enduring. Or, an end-game build with Blood Warden, NOED, and Remember Me; you could add Fire Up to that selection, and it's okay, but not the strongest perk out there.

In the insta-build, you're objective is to hook someone as quickly as you can. Hooking that player forces at least one other survivor to come for the save, which you can turn into a second hook quickly via Make Your Choice. In the best case, they recognize you have Make Your Choice and are more hesitant to go for hook saves, which robs them of a quarter of their momentum with each hook you make. Once you get three, if you protect your totem, the game is all but won.

In the second, you're hunting a particular survivor in the obsession. All the better if they have DS, since it gives you an extra stack on Remember Me. Once the last generator is complete, you're keeping them inside with wanting to save someone on the hook, as well as Remember Me, Blood Warden and your reverse bear traps not allowing them to leave.

I've always viewed end-game builds as extremely risky, and they aren't to my style, but I have seen them work and work very effectively.

What I see in the build you suggested is an attempt at a competitive early / mid game, while abandoning the strongest early / mid game perk in the game. It can work, and it can work really well in some games if the RNG and survivor mistakes are in your favor. If they aren't... it'll be painful.

I understand why people don't like relying on Ruin, since it can be broken very quickly in any given match. That said, it's purpose isn't to last all too long, not really, and you can't rely on that happening. Instead, Ruin is better viewed as a perk which exists to slow survivor momentum long enough for you to take control of the match.

We have to accept that survivors begin every match with 100% of the momentum. They start near generators and away from the killer. They can start work immediately, where the killer must first find, then chase a survivor to slow that momentum at all. So, ideal match progression goes:

Point in Game / Survivor Momentum

Start / 100%
1st Chase / 75%
1st Hook / 50% (One on hook, one going for the save).
2nd Chase / 25% (One on hook, or just taken off, one going for the save or making the heal, one in chase)
2nd Hook / 50%
...

The longer you can maintain that snowball, the less time each survivor spends on a generator, and instead in chase / on the hook / making saves / healing... anything except generator progress. Even if they find your Ruin not long after the first hook is made, it has bought you enough time to begin your snowball.

If you aren't using Ruin, and you aren't using Nurse or Hillbilly, then you need to find another way to take control of their progress.

Just use the normal brutal force build...
Enduring, Spirit Fury, BBQ and Bamboozle.