It depends on who you play with. It can be fun with friends. I started having more fun once I got better at my favorite champions and got to the point where I can play any champ at a halfway decent level even if I've never played them before.
You really need to get out of "elo hell" and do ranked games (if you think winning is more fun). People try harder in ranked. If you can have fun in losing, then normals are fine.