There are a very small handful of Youtubers who have made a fuckton of money who could afford to challenge something in court. Although few of them seem to have the same trouble with copyright as smaller channels which some smaller Youtubers find suspicious, suggesting Youtube treats the channels that bring them the most money differently to those that only bring them in a few quid, but they could use that money to help someone who is being fucked with to take the people in question to court.
I mean this bollocks where literally anyone can make a false claim against a video and take the money it generates for a month, without having to give it back if the claim runs out and the monetisation reverts back to the creator, is just straight up theft. It's happened to videos that are 100% the creators own content, such as videos of songs that the uploader wrote and performed themselves. Even when the video does contain some copyrighted content sometimes the claim is made by someone with no connection to the copyright holders, as the Youtuber discovers when they investigate the name of the group making the claim and contact the actual copyright holders to ask if these people have anything to do with them.
Somebody needs to sue the ever loving shit out of these fuckers and press for criminal charges as well. But that takes both money and balls and I'm guessing the big Youtuber's who could actually afford to pay the legal fees for another less fortunate Youtuber make too much money and get too much preferential treatment from Youtube to want to rock the boat.