easyanticheat is by far the worst i've ever experienced. That was the one that would crash if it saw pcap.dll, and I use virtualbox as my VM software of choice so that could be part of it as well.
The fan control system is a bit weird since it's a pretty unknown little program, but it took me a while to find because at least easyanticheat wouldn't tell me which program was causing the error, so I had to manually close them until it worked. This is what actually put me over the edge and made it so I'll never buy another game with easyanticheat again unless they significantly rework how much access and power they need.
There are so many games out there now, and so many different developers and styles, that I don't need to put up with these kind of problems to play a good game. Especially when that software is almost always beatable by how often I'd still see cheaters in the games, which meant that the only ones being punished by this are the lazy hackers, or paying customers.
I mean, if you are an outlier, voting with your wallet is never going to work. That is the problem of being an outlier.
And being an outlier doesn't mean you are insignificant. Sure, the latest Call Of Duty won't miss my income, but a smaller dev that was thinking about using easyanticheat because it was cheap and easy to integrate might think twice when reading comments from me, or if their demographic overlaps with people like me that won't put up with it.
I can't in good conscience talk about how much I dislike invasive anti-cheat programs while still buying every game I want that has them.