As always, if you don't like it nobody is forcing you to spend any more money beyond your sub.

But if you really want to protest against it, quit the game. Cancel your sub. Don't pay SE. Ofc you won't do that cause writing an angry text that will change nothing at all is easier than taking literal actions of protest. Can't live without this whale mount and all the other optional stuff and glam, right? But hey, at least you made a angry forum post! That will teach them!