Silva's comments on Kavanagh's previous Fulham matches seemed pretty weak and unnecessary in the circumstances, especially as quite a few of the incidents seem to have been more ones for VAR.
Of course referees will sometimes make mistakes and managers can make constructive criticisms when these occur.
But I don't think it's helpful for managers to start speaking about a referee's previous record, especially when referencing such a small number of games. You'd basically end up in a position where if a referee had one poor game they'd be stopped from refereeing that team again or need to consider the decisions they give against that team the next time they referee them which doesn't sound a good place to be in.