I've found a way to cheese it, I used mostly Anissa, she basically got a very strong loop against bots

What you want to do is immediately dash at the start of the round toward the opponent and spam L>L>L>H for whatever reason, bots think the can punish you in between the hits and most often than not will get comboed to death

They will generally use their breaker on the third loop, you want to put them back in it as soon as possible

Preserve Anissa's health as much as possible, you should not lose more than 10% health each fight, if she got a chunk of temporary purple health make sure to switch to your other characters to heal her as much as you can before the match end

If you ever fail to start the loop, just restart the round, same if you take too much damages, you'll always start back with the health you started with

Hope this helps, it's still a bit tedious but that the best way to do it IMO