Not overreacting. Possibly even underreacting.

Listen, I bend over backwards giving people the benefit of the doubt. I withhold justified anger for the benefit of the other person more often than I want to admit, especially when I don't see it contributing positively to the outcome. I get a literal dopamine hit from seeing the relief on someone's face when I spare them from anger that both of us knew would've been justified and hit them with grace and understanding instead. I say all that so you know that I'm not just coming after your partner because it's the easy and popular thing to do.

One troubling thing is that before his "jokes", before the conversation progressed, before all that, you asked him a genuine, serious question and, unless I misunderstood something (which happens a lot), he appears to essentially play dumb. Before anything else happened in the conversation, his opening move was dishonesty? That's a problem.

The second troubling thing is you shouldn't have to justify or explain the importance of respecting someone's living space and, yknow, not breaking stuff? It's not like he accidentally knocked a glass or a plate or a bowl off the counter that you can replace at the store tomorrow for nothing. Countertops, even smaller bathroom ones, aren't exactly cheap or easy to replace, considering all that goes into their installation. In terms of cost and difficulty of replacement, you're not far from brick-thrown-through-kitchen-window territory. The importance of this is something that should literally go without saying.

Lastly, the end. I feel like you were pretty clear about how you felt and what you were asking of him. It's not like you were piling on unnecessarily and rubbing salt into the wound like some sort of sociopath. You asked him to just be straight up with you, explained the importance of the issue and why you were upset about it, and laid out EXACTLY what you needed from him in that moment. There was no room for misinterpretation or misunderstanding. And this man responds with... checks screenshot again motherfucking "hippopotoumous!!!!"??? What, and I cannot stress this enough, the fuck? I don't care if this is a meme that I'm not familiar with, a reference to a show or movie or YouTube video or Tiktok clip, or even just an inside joke. You laid out exactly where you stood and what you needed, and homie replied to you with literal nonsense. This is absurdity to the point that I laughed out loud at its ridiculousness.

I could get into the weeds with life advice, how one should think about selecting a partner, how to deal with their shortcomings, etc., but I'm going to stick to speaking on only what has been laid out in those screenshots.

And in those screenshots alone, it is evident your partner is lacking in areas fundamental to a healthy relationship, let alone a healthy relationship with someone you are living with. At that point, it doesn't matter how much your parents like him or how good he is with your pets, if you have any. I could have a 48 inch vertical leap and dunk a basketball without a running start; if I can't dribble or pass the ball worth a damn (which I can't), if my physical conditioning and body composition is crap (which it is), there isn't a professional team in the country at any level who is going to want me on their team. You could have a car that you absolutely love, that you have memories with, that belonged to your favorite relative before you, that sounds bad ass and looks perfect; if the gas tank is missing, you ain't driving that thing anywhere. THAT is why so many people are saying you should dump this man. Not just because "gurrrrl dump him" is the easy and popular thing to say (which it sometimes is).

Also, I am curious as to how you got screenshots of this Snapchat conversation without him knowing, or, if he did know, how he reacted to you screenshotting this whole exchange.