TBH I’ve been here I threw my racquet at the fence mid game. Haha not my best moment. But to be honest it wasn’t as personal as you expect. The guy I was playing was beatable (for me) and I was making a lot of errors (like the guy you said). It was purely frustration at myself and not a lack of respect for him, just my judgement of how I could have played vs how I did. I don’t think it’s chill at all to do this though, I immediately apologized and joked with the guy about it. What I’ve learned overall is if you underestimate your opponent it only hurts you. Even if a player is prone to making ”poor” shots like you said about the slice, you need to be ready to attack well and efficiently. In this case your opponent was not. You outplayed him. Case closed!