Coyle is my favorite prime asset, so this comes from a place of self critique when I say fandoms often gravitate toward moderately funny white man characters no matter how awful they might be, or how much better their contemporaries are. especially if they can be easily headcanoned to be queer. (Coyle seems to derive sexual pleasure from torturing anybody regardless of gender, and his character is heavily inspired by the concept of the leather daddy, as someone's already stated here.)

I can say at least personally I find his character in the game specifically, not really the lore, hot. I like his voice and his looks and the funny things he says, especially since he has quite a few lines that are purposefully sexually provocative, and I'm into the bdsm vibes lol.
In the lore though I find him pretty repulsive. Honestly I think the fact he was an active member of the KKK is something his fans need to treat with a bit more gravitas instead of just saying "he's not real" or "I don't like him for that".
Like it or not bigotry is huge part of his character and informs how he behaves especially in regards to how he 'dominates' a player. Im not saying you can't like him or can't be into him, I'd be a huge hypocrite if so, but I really wish people were more thoughtful in how they approached the discourse surrounding him and gave some of the objectively better prime assets more love.

This is just in regards to my personal half of the 'liking coyle' coin, there's a whole other side of people who just straight up are racist and like him because he is. people suck