Why do champions with energy, have "easy" abilities? While mana champions do not?

auto aim q, huge aoe E, ultimate tends to hit everyone (ult) huge Q range huge aoe no cooldown, double crit chance lock on ultimate, each skill kills someone (grab range is far, Q damage is crazy, free magic pen).

very very slow skillshots, mana costs are insane, has to back every 2 to 3 waves needs tear to play the game, does no damage if you miss Q nerfed instantly when he is the only viable counter pick to the energy champions grenade can hit people and it won't stun (lol) pretty much a troll pick

past champions that were nerfed, that should apply to current day champions Q cleaver radius reduced to encourage more skill---> he strong but.. SLOW like a juggernaut should be --> crit/invulnerable champion that isn't annoying, has a cooldown on his DASH --> his ultimate was way too strong.. lowered the damage -->

current energy champions that are in a good position no lock on ability except for taunt, his ultimate takes forever to bring him across the map; still viable in all forms of play. his late game is still very weak, ganks are extremely easy to avoid, no real one shot combo; has to set it up. (doesn't really do dragon fast)

Sett? No.