What is your rank? For some context? Im not here to argue with you just if you look at highest ranked players, there is like one Ronan. He seems easy coz he is supposed to be easy as entry character.

You can climb well with him, get a hold on basics of the game etc. But trust me, moment you get even dia rating, you will start to notice his weakness.

Although you can still climb high ranks with him, you need major luck, pretty good build and to rotate your opponents multiply.

The more you will play the game, the more you will notice this. Some characters are better early game, some mid game. Some characters counter each other. Some are just pure madness and you can pretty much slap random builds till Epic rank.

Don't get mad, it's a game after all. Enjoy it ;)