if he is braindead then everyone would carry with Mordekaiser and most would play him...... he is the most immoble with a shit type of kit champion that is going to be fully reworked by Riot and they said it.. they will take a serious focus on him after they are done with the reworks on the list.
He is considered as hardest champion in game due to him having:
Cons:
- Worst stats for a juggernaut
- Slowest movement speed
- no CC at all
- no slows nothing gives you gap-closer
- no escape
- weird scaling damage for a juggernaut
He is also a melee champion don't forget...
Pros:
- taking enemy's adc's ghost "LATE GAME" can win you the game or at least change it to very close winning
- Can enslave Dragon's soul for a powerful pushing in "early-mid" game
He is more like a luck based character atm, it's why they havn't given him a skin in ages, no buffs nothing they did to him, He is going to be fully reworked VGU and confirmed too.
I don't see how he is a braindead tbh he is very hard and complicated to win games with, you are either lucky getting ahead and buying your items to keep pushing or you will be extremely behind and most useless in game.
Getting ahead with him is the hardest.