My children play on my account all the time and I teach them to not play BM, to made them understand, that proper playstyle is showing superior behaviour.
I also like to mention, that to say sorry is a big gesture nowadays and should be honored and not get talked down or cheap.
If it’s his nephew playing or not, is not on us to decide or judge. Maybe it really was like this, or maybe it just makes it more easy for him to say sorry.
Regardless, everybody should forgive if an apology was said.
First of all dude was running a UC/PvE hybrid setup with Skele, Auro, Atra, Crim, Grovo etc. He disconnected and reconnected at the early stages of the match maybe because bad connection or maybe because he thought I would give up. Nope. I managed to destroy his brainless tactics after which he deliberately disconnected when he had only Auro left. He also waited a while before doing that. What a Chad
Often you have an opponent who will not finish you directly, just play 4 or 5 unnecessary moves, then finish you. I consider this as not nice, but not as problematic.
A different situation is a lock, which gets dragged for 10+ or even endless moves.
From many pictures posted here, sometimes both can be possible.
So I would recommend to record a video sequence as proof for the developers to take action. Sometimes a screenshot is not enough evidence.
Of course a screenshot can also be valid, for example if the fight time has elapsed unnormally.