The way this is worded, it kind of sounds like you think she owed you some kind of romantic interest for your efforts. Not how it works, dude. It is entirely possible that she took advantage of feelings she knows you had, and that isn't okay either, by all means call her out on it if she did, but leave it at that.

It sucks that she lied and preferred to spend her day with someone else. It’s called “Letting someone down gently” While she was cowardly and lacked the female balls to just tell you she wasn’t interested in you, you are also in the wrong. Vandalizing property just because they didn’t reciprocate your feelings is where you ****** up. The time you spent buying the paint, cutting your hand and getting stitches, should have spent finding someone who does reciprocate. You’re a psychopath. YDI

Luckily karma got to you before your dumb ass got busted for vandalism. Stop overthinking and overdoing things before the next woman you take an interest in doesn't reciprocate your feelings and you go full incel.

You were justifiably upset, but that is not the way to handle the situation. So that's just karma.

She owes you nothing… you didn’t have to do those things for her and you’re not dating, so she can go out with whoever she wants. This is a very toxic response to rejection. Call a therapist.

This reads like something I would see on the likes of Forensic Files or Zack Morris Is Trash. What the hell is wrong with you? For the love of God, get help.

You have every right to be upset, and you have every right to tell her that her actions upset you. However, you have no right to damage her property unless you want to be described as a 'psycho' every time anyone asks her about you. If you are unable to be around her without anger, then walk away and work on yourself

She owes you nothing for being "nice." You only did those favours to get something in return anyway, which is messed up. Leave her alone from now on and get therapy before you end up with a criminal record.