Either you have such low tolerance for ANYTHING seeming like the lifestyle of a weak/beta dude, or you're insecure about your own masculinity that you can't tolerate characters who act weak and are bullied.
If you can't tolerate even the implication that your character is a weak/beta at the start, but he is a good dude because he LITERALLY saved Becca from the bullies, standing up for the person/friend he likes/loves. He stood up for Becca, he wasn't a complete cuck, he actually took actions as a character to NOT be a cuck. But for you the implications that he's a cuck because he isn't a strong rambo like alpha male, and the moment another male character is about the enter (who happens to be interested in girls) the scene they should get decimated, so the whole show should be a guy surrounded by sexy girls at a school..
I am sorry but I don't see the merit of your line of thought, and I think you have issues if you can't get through a couple of scenes where Darnell is harassing a girl (who the MC literally saves her from), and 1 where he tells your SISTER to show her panties to you (you know that sisters don't usually like their brothers, right? So if she's interested in Darnell at the start, then that's more than realistic, and isn't "cuckish", because she was never his anyway.).
As far as I know cuckoldry/NTR is literally another dude making out/having sex with a character that you like, in front of you. The scenes at the start DID NOT have that. The only cuckish moment was the sister part (which again, she's your sister), but that was 1 single scene and it wasn't even to the level of making out, but rather an indication a "foreshadowing" of what you need to deal with "if you want your sister back". Like have you heard of the "skip button"? If you can't get through that, like others said, I think the issue is with you. I don't like NTR/Cuckoldry, but the start of this game is literally just setting up the basic story so we could contrast it to what happens after.