I haven't played that game so I can't really comment on it. But I've heard a lot about how toxic the League community can be... people taking it way too seriously and raging at teammates. Playing only with friends makes total sense if you want to avoid that. The game itself might be great but toxic players can ruin any online experience pretty fast.

I have played the game in the past but these days I am not playing. When I played, I did enjoy the game. I stopped playing not because I was getting bored, I stopped because there were too many games on my plate and I had limited time.