Sorry to break it to you, but you will most likely find bots only in the tutorial of the game. Surely, there were some DDoS attacks during the offical tournaments, but no longer, at least for now.
The replay system has been shut off for a long time now to save money to keep the game’s servers running. After all, the game’s company is in bankrupt and they don’t get much money from the game.
The chat bug isn’t even that bad. It’s not game breaking and it’s actually more fun to be able to chat with players from other games. This might be fixed in the next update though, so no need to be so negative about it.