So Med was fined $12k for his demeanor in this match: the same that Shapo got for his famous "you are corrupt". I think the fine was lenient because Med's tirade looked more serious and the tone was far more abusive. Maybe they considered that Med apologised post-match, but that should not be consideration IMO.
The ump also did not handle it well. Not because he was lenient to Tits: he simply wasn't sure what Daddy Tits was saying, so if in doubt leave it out. Eventually, when he dispatched Eva as a spy, he learned the details and was able to judge if the rules were broken. Ump's bad handling of the situation was that he let Med continue playing without any on-court penalty. We should have said something at the start of the next game: "Ladies & Gents, code violation, unsportsman-like conduct during the break, point penalty. Medvedev, love-15". Such correct handling of the situation, would no doubt change the match, because Med was 15-40 in that game but managed to hold it. He'd likely not hold it if he got rightly penalised for his behaviour, and consecutively, he could have lost the set.