This is what I see in between every two brawls I successfully join: full brawls that I can’t join, brawls that look available but give me errors when I try to join, brawls that think I got into them only to find that no, the timing was wrong and when I refresh it I get a bunch of dots instead of avatars, then back to yet more brawls I can’t join.
Many people have complained about this. Solutions have been proposed. Implement them.
This happens every event: