Some redditors just bring the worst of reddit with them when coming to the fediverse, like tracking mud into the house. Some are still recovering, and slowly acclimating to the fact that you don’t have to be an overly defensive, argumentative prick all the time. Some just stay that way because it’s all they know. Some are still learning that every difference of opinion doesn’t have to become a tiresome debate. Some are OK people. Some are just plain assholes.
As a reddit refugee, I’m in that paragraph somewhere. I’m only half joking when I call it PRSD - Post Reddit Stress Disorder.