The probability is you fried the power supply - Not the most expensive subsystem in the computer but still a pain and it could be expensive if you have someone else do the replacement or you aren’t technically competent. That’s not supposed to cause damage but sometimes it does… If you have something to say, just get in their face and open your mouth and say it instead of having a hissy fit and damaging things. That’s lesson number 1… Lesson #2 is compromise. Neither person in a relationship is really in 100% control. You always have to work things out and compromise instead of trying to force things to be the way you want. This is every bit as important as lesson #1 if not more so… Frankly my sympathy is with your ex.

Being involved with someone who destroys my property in fits off rage? I doubt the monetary loss is the reddest of the flags here.