I understand what you're talking about. I played on a new map, chosen it once by mistake, didn't know where to go, how to complete challenges, and fell to death several times. That was a shame. That's why learning stuff is better solo. But i enjoy the fun of jolly cooperation, all thr silly stuff. Like, once i played in a team with randoms and we were steamrolling all the bosses. We got to the second day boss earlier, and were t-posing for a half a minute before it appeared. That's what i miss playing solo :) Also the epic comebacks.
That's why one of my favourite characters for multiplayer is Revenant, love her ult, and the whole original concept. But it's hard to choose only one. Like, yesterday I had amazing runs with Recluse, even though I underutilize her skill. I also enjoyed completing stories of Guardian and Executor, gotta play them more. I literally don't have unfavourable characters, everyone is lowkey satisfying. Maybe Wylder is a bit boring, since it's my standard ER/DS build