(Average+) Tokyo Revengers

Series in one sentence:
Useless man feels sympathy for criminals he just met.

Series in more sentences:
A young man with a lacklustre existence gets pushed in front of a train one day and transports back 12 years into the past. He uses this opportunity to try and stop the death of the one girl who ever loved him, but his meddling becomes the start of many complicated situations.

Started so good, became so average+.

It took a turn I didn't expect it would and the story is mainly set in the hopeless world of crime. Having that said, why is Takemichi so willingly involved in all this and how can he consider the intimidating assholes he surrounds himself with his friends? They're not friends if you're scared of them.

It's hard to care about any of these punks, as they constantly death-stare each other or inflict physical assault, making the claims of friendship and their "fun" moments feel disingenuous.
The main character got punched so often, it started to bore me. Why hasn't the constant abuse motivated him to start working out or pick up a fighting sport? He's laughably unprepared every time. Takemichi is a loser, I don't enjoy seeing him on screen, he refuses to change.

I also found it strange that the love interest is interested in Takemichi. She constantly finds him beaten up and even brings up his less pleasant behaviour that emerges the moment his future self isn't taking over the body of his young self, as if the "real Takemichi" from that time period never really was all that romantically interested in her. Clearly the guy is stressful to be around, so, why did these two start dating?
Takemichi didn't really bother to keep contact with her and she didn't stick around in his mind for all these years -not until he happened to discover she was killed. Why is preventing her death so important to him? Because going back in time reminded him of how nice she was and he's a dweeb with little else going on? Either someone made an everlasting impact on you or they didn't, there shouldn't be any "reminding" necessary in a love story.

Takemichi's main goal of saving her involves way too much work that -realistically speaking- no one who has a connection this weak with another person would let themselves get beaten up over.

But the story almost could've won me over. There's this point in time where he determinedly utters the promise to get at the top hierarchy of his gang, I was on the edge of my seat after that, but it was a damn let-down.
The guy is just too much of a wet blanket; he always just stands there, letting things play out, instead of properly interfering, and yet, the neglectable things he does and says are always being overblown by the anime and the characters in it.
His docile, boyish crybaby demeanour would've gotten him killed in any realistic setting.

I don't know if I care to watch any more of this. Not unless the main character starts cleaning up his act and does something cool.