Why do they force us to play and win faction wars, that's not fun either?
Faction War is there to force you to build different champs. You need in total 75 champs to clear FW. I think FW is the best content in game, there you have something to work against, a goal. And after you completed FW and got 75 champs at lvl 50 or 60 then it have become super strong and you can cruise through content like Doom Tower, Curced City.
Live arena on the other hand is just pain and frustration.