Unfun and frustrating to play against: The Ghostface

I will go for each point:

"There is no real counter to his power, since you can be exposed while literally standing in front of him and staring at him."

This is 100% correct and needs to be reviewed. You can look at him the whole time and dont reveal him, or simply look in one direction, dont even see him, and he gets revealed. His Reveal-Mechanic is simply broken and dumb for both sides. What is kinda frustrating as well is that the Reveal Process starts again when he hides for a short amount of time, but the Stalk-Meter does not reset when doing it. But I dont know a fix for that, because it should not be too easy to reveal him (maybe instead of restarting at 0, let the Revealing gradually go down).

"This killer is the ultimate tunneling machine, since he can easily counter BT and down people right off the hook again."

Sadly this is a problem with every Stealth Killer, but I highly doubt that you will get friends here when proposing that BT works with Killer Distance from Hook. This would be totally the correct way, because only because that Ghostface is in Nightshroud, or this Wraith cloaked, or this Pig crouching, does not mean that they are not camping. That Doctor which is using Distressing is also not camping, only because his TR is huge af. But like I said, I doubt that this will make people happy when BT actually works against campers.

"GF should not be able to hide his red stain and his TR. It benefits the killer way too much without requiring any effort any effort."

While it is correct that going into Night Shroud does not require any Skill or Effort, this is how he works. He is stalking people while hiddin (or at least he has the ability to do that), and therefore he needs to hide his TR and Red Stain. This is a basic mechanic and should not be taken away. I mean, this is like saying that Hillbilly should not be able to use his Chainsaw until he is 8 meters close to a Survivor - because it does not take any effort or skill to run around the Map with it.

"The ability to crouch spam should be taken away, since it is abused by almost every GF killer."

Eh. Thats a BS-argument. Same can be said for Survivors, people just need to learn that they should not be offended by teabagging in general. The only thing that would be dumb on a teabagging Ghostface is, when he complains about getting teabagged while doing it himself.

"I can see the devs' original intention when creating this killer, but sadly these things are abused by killer main players."

I would not say "abused". The way of playing him without much stalking and just running around in Night Shroud, spreading damage, is the best way to play him, not gonna lie. And this should change indeed, but not by nerfing him. The Stalking Mechanic needs to have some form of impact, because currently you might stalk people, but when they are at a loop, you might not even get anything from it. Or they see you before and then you just wasted time stalking them. Currently Ghostface is only using half of his power, and this is something that should be changed. If there would be more changes than "Make his stalling meaningful" (like nerfing his Stealth Potential) would be up to the Devs.

And, of course, his reveal mechanic should work. Because it is quite clear that new players cannot understand what is going on and why they cant reveal him, when this is not even understandeable for players like me who have over 3k Hours and who reveal Ghostfaces here and there by just looking in a random direction or not by straight looking at him without ANYTHING (not even the own character model) blocking the line of sight.

Has every killer nerf begun with baits?

Dont...feed....it...must....resist...

Just deal with it, like killers have to deal with SWF.