I don't find online to be that hard. After your first few matches, you aren't going to be placed against people you can't beat. Most people have similar records or ratio of w/l as I do. I wanna say ranked I am 10/11 and player matches I'm 26/25
But that's also because often times people only play with their best character, while I like trying out a bunch of different people. I'll bring a lvl 5 cat woman to fight your lvl 20 Batman etc
I actually don't have any lvl 20 characters. But I have like 7-8 lvl 10 people that I rotate with
I only zone people out when I know that's what they are trying to do. If you pick green arrow or Darkseid and want to just chip damage me all game, then I'll choose Aquaman and zone you out. I find Aquaman to be superior when it comes to that as he can throw the trident and also do the tentacle slam
If somebody wants to rushdown etc I'll usually choose a matching character