It's not as bad as it sounds! Bound Gangbangs features, well, gangbangs with women in bondage. It won't come as a surprise that a lot of the scene setups here feature forced sex. Apart from the setups, the sex is pretty rough. Very rough in a lot of cases.
My recollection is that Kink was concerned that credit card companies would refuse to do business with them. That would obviously put a rather large nail in Kink's coffin if subscribers couldn't just use their cards to join. I recall that the biggest concern was that the scenes had the women in bondage so the 'fix' was to simply end the bondage aspect but keep the hardcore sex, including the rough edge and forced sex in. Yes, that seemed odd to me too...
I'm pretty sure that Bound Gangbangs no longer updates because of this, but there are probably over 40 scenes there.
So if I implied that by joining Kink you put your credit card in jeopardy that wasn't intended. I haven't joined Kink in a couple of years but I have multiple times in the past both when you had to join individual sites and when it was sold as a network and I have never had an issue with them. Cancelling was easy.
A few notable scenes are:
Ashli Orion and Lily LaBeau - the women run into a couple of schoolmates in a mall parking lot and they invite the women to a party. We see Ashli and Lily getting ready to go and talking about how much fun they're going to have but as soon as they walk in they are outnumbered. The door is locked and the guys pounce on them.
Daikiri - this is a Russian model that I don't really know. I downloaded her scene because she has the look I like. Others here have commented that this scene is extremely rough and Daikiri looks overwhelmed in it. I went back and watched it based on those comments and people are right. Search her name here and you'll likely find those comments.
Lou Charmelle - Lou is dating James Deen and it's her birthday. She gets dressed in sexy lingerie for James hoping for some birthday love but James brushes her off. Lou heads to bed unsatisfied. After Lou falls asleep James calls in a bunch of his friends to gangbang his girlfriend.
Melody Jordan - this is definitely my favourite scene here. Melody and Princess Donna are out for a drive on a nice day. Melody has to pee so they stop at a biker bar so she can use the bathroom. The staff and patrons give her a hard time but let her use the facilities. While Melody is in the bathroom the guys lock the door and Melody can't escape. She plays this really well. As an aside, for peeing fans, Melody peeing isn't implied - we get to see her pee.
Sarah Jane Ceylon - this scene may have originally been shot for another Kink site. It doesn't really feature coercion but is a pretty hardcore gangbang nonetheless. Midway through the gangbang Sarah Jane has black contacts put into her eyes, effectively blinding her. Kink is known for it's creative bondage and in this scene Sarah Jane is made to kneel on the floor and place her head into a pit in the floor that has doors that lock around her neck so she can't escape.

There is also a camera in the pit with the image being displayed on a TV screen so everyone can see Sarah Jane's face. The guys line up to pummel her ass. For fans of painal, Sarah Jane really does struggle in this scene.
Hardcore Gangbang has a lot of rough scenes too. The Jessie Rogers one is noted in comments on ADT as being rough and possibly the scene that turned her from porn. It is rough and I got the sense that she was in over her head with this. But, Kink is also known to respect the models and their safe words so I'm sure that Jessie could have called it off or had it dialed back if needed.
Two other sites you may want to check out are Assylum and Slavemouth. These are run by the same guy. Both sites feature some super-hardcore stuff like bondage, peeing, and tons of humiliation if you're into that. Assylum focuses on anal sex while Slavemouth is all oral. But very hard oral...
Both Assylum and Slavemouth have trailers for all of the scenes so you can watch a few of those and get a good sense of what you can get there. I am reasonably certain that you can't buy individual scenes at either site though. It's worth checking out the trailers though.
https://www.assylum.com/?home
https://www.slavemouth.com/
There are far too many memorable scenes for me to mention them all, but a few favourites are:
Casey Calvert - in one scene Casey does puppy play. It isn't something I'm into but, hey, it's Casey and it's HOT!
Jessica Kay - she cries in almost all of her scenes she gets so into it.
Charlotte Sartre - Charlotte is a freak (and I mean that in a good way!) and all of her scenes here are over the top. She gets waterboarded (with piss). She has scrambled eggs and veggies injected into her ass that is then squirted out into a pan and cooked for her to eat. She does tons of piss play.
Olivia Kasady - she has a scene here where she is dressed as a cheerleader. At one point the male talent gives her a piss enema and makes her jump up and down while holding it in and saying really degrading cheers like "Give me an E, give me an N, give me an E M A! Nasty enemas today. That's how I serve men!"
Rebel Rhyder - Rebel was new to me in this scene. If you aren't familiar with her (she has a thread here) she doesn't do vanilla porn. The two scenes I have of her at Assylum (she has since done more) were some of the roughest I've ever seen. But remember, Rebel is known for her love of this stuff.
These two sites may not be what you're looking for, but you should check them out at least.
Good luck!

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