Mordekaiser has....
No CC No range Extremely slow movespeed Requires 3 hits before doing any damage. Easily kited
Yet for some dam reason people just walk up to him as Naut or any melee champion and act like everything's gonna be all right feeding him and giving him the aura of being OP. Is it really that hard to just not feed a Mordekaiser? Sit poke him in lane, gank him often and just focus him down early and he'll be shit, but noooo, people just walk up to him carelessly take a shit ton of damage then cry "OP", just quit.
Bring in the downvotes~
including the fact that they don't have innate AS buffing ability, everyone seems to agree along for their nerfs.
a lot lately and ive notice that that i can kill all the mordes by just doing my r, q, e, w, q ,e combo and outrange him. the only problem is that if i use pool and it ends to close to him, i get rekt.

any adcs that are too mobile for Morde to catch or have long enough range harass Morde down in lane
Not even joking Support Trundle is probably Morde's biggest counter for support. But as for the Supports pretty much any that can lock a Morde down and punish him for his positioning.
.
solved that problem) that just killed everything. You'd think they could get away from the 3 hits ability. NOPE.
support with
adc and
support.) as soon as i landed my taunt morde would pretty much rape them. but if morde is just by himself then it shouldnt be that hard to not feed him like you said.
EDIT: hes also pretty easy to gangbang if hes trying to splitpush