I agree. That is why you have to be a fan of the bigger clubs now or you will be frustrated because you can't get attached to players. For Dortmund Reus has been there forever, but other than that who? Hummels and Goetze came and went and came back again. Bellingham, Sancho, Haaland will be gone in the next two years. With young talent only you have to have coaching like AJAX. Two years ago they should have made the UCL final. Took a Tottenham miracle. They had De Lict, De Jung, and a few others and have great coaching.
I am / was Oakland A's fan, and I am nearly 60 and remember those early 70's teams that won 3 World Series. After that they became a minor league club for the Yankees, other than a few years in late 80's and mid 2000's. They always sell and I got tired of it years ago. I think everyone in Oakland did. Never could draw fans but with management like that for so many decades there is no real fan base.