Mordekaiser Gameplay issues
Morde is very... clunky. His gameplay is not smooth at all and this can be very frustrating. First of all, his W is nice to use as an escape but Morde is a primarily mid/top champion - so this doesn't help very much when you're by yourself. His W can be cast on a minion however for the move speed bonus.
Mordekaiser has no escape plan unless you use summoner spells, which means when they are down you're last resort is to stand and fight even when you know you will die. Here is where you will find your problem. The smart player would attempt to kite - trying to use E and Q in rotation while slowly taking steps in the direction of retreat in an attempt to use his shield passive in order to survive.
BUT altogether he is just too clumsy to do this.
Recreating the bug: Scenario - Imagine you are an offending Mordekaiser trying to keep your shield up against an enemy champion at the enemy tower, both sides have minions around. You would want to E and then immediately turn around and walk back after taking turret agro. 75% of the time, your E will not fire correctly. It will cast and hit nothing. Often your E will hit nothing even if enemy minions are right in front of you. it is just clumsy and the aim with autocast is awful.
Furthermore , if you are attempting to flee enemy pursuit and maintain your passive shield with a little E kite spam, this is just impossible. Morde does not turn fast enough and does not cast fast enough to pull off this maneuver. Any other champion would be able to throw back skill shots over their shoulder while running, but for Morde this is just impossible.
His gameplay is sluggish and cheap