Aatrox. Failed early Prototype melee carry who was effectively given under performing abilities and stats to justify a wonky W.
No sticking power for a melee only champion.
Can't build defensively because everything on his kit requires bonus AD to be effective and his abilities cost % current HP so he'll just damage himself more than the enemy will.
Can't effectively use the W ability that his kit is built around because melee carrys are prone to kite, burst and cc lock so the 3 hit passive is useless in ALOT of situations. This also makes him need to build defensive stats that his kit punishes him for building.
The rest of his kit is giving sub par abilities with sub par stats to compensate for having a built in heal and semi decent damage proc when other champions have similar or superior mechanics with no compensation.
Has a revive passive that also makes serves as a reason to under tune the rest of his kit. This of course is worthless as most champions can out kite, or out burst you before you can even get them to half and then wait for CD's whilst your reviving to lose the measly attackspeed buff you get in return for about 1/5 of your HP bar that can be instantly bursted down again leading to your death.
If I had to describe Aatrox I'd call him a champion where riot OVER balanced him by attempting to do 1 parts weakness for every 1 parts strength they attempted to give him.