that is no excuse he could have stopped some things even undercover .
His mission is to find 3 missing girls yes but that doesn't excuse his behavior of letting all the clubs keep doing illegal or degenerate things.
He gave up if trying to stop Lumi from getting a tattoo of the cult , gave up of letting her innocence start getting corrupted , something so simple that would have NOT expose his cover.
He did nothing to stop the Winners club from taking drugs in fact one of the options makes the MC also take the drugs , and that is the main option , the one with benefits for the club story.
The fighters club illegal fighting would have been harder to stop without exposing himself , and he did help the fighters club , but joining the illegal fighting in hopes of getting information out of that , is just dumb.
He could have gotten the same information , just being in that inner circle.
The writing of this game makes no sense as of recent updates , it started well and just got worse each new update.