Sometimes, heroes can die just like that. Reminds me of TE Lawrence, aka Lawrence of Arabia, whose end came from a fatal motorcycle crash to avoid hitting two boys. His death allowed advances in motorcycle safety with research and use of crash helmets. Perhaps it will be similar here in the...
Nah, as messed up as they both are, I fully believe they really do care/like each other. Yes, Sasha sleeps around but she doesn't view them as her "lovers", while our MC is so far gone he's okay with this. I always just frame the relationship similar to a netorase one.
This is genuinely one of the worst TLs I've seen in a while. It would've been better if you dropped white boxes with text on them on the actual page instead of awkwardly trying to put the text on the sides of the page. The effort is there, but lacking.