Ugh...I'm not a fan of NTR but I'm slowly being corrupted...thank god it also has a non-NTR route to balance myself out, although looking through the completed save's gallery the others look dangerously tempting lol. So conflicting.
If you can enjoy NTR games as well, the amount of games available to you will increase a lot.
A nice trick to get used to it is to go into an NTR game with a certain mindset.
For an example you can decide not to personify with MC. You know he's gonna get shit on.
Another trick is focusing more on how your actions in the game are part of corrupting the girl and maybe put yourself in the shoes of the 'rival/villain'.
It's different from game to game what will work best to soften the blows and when you've gotten used to it, you won't have to.
To me. Playing this is like watching a movie. You root for some people and others get dumpstered, it's fiction, enjoy it.