Don't worry, you'll get a main eventually. It took me a while to get one, but it was worth it. Imo it's perfectly acceptable to play multiple characters.
I do however I mean an actual main. I normally have a character to fight certain people however if they are really good and I dont know who to use to counter pick, then I'd want someone to call my best so I can use them and feel safe. Right now i feel uncomfortable with everyone and unsafe. I dont know why.