I don't have anything against Jeffrey Dean Morgan at all, I consider him a fine actor and I loved him as the Winchester's father. Negan on the other hand... his character is soo cartonish for my taste and the problem with this is not on Jeffrey side. It's the directors/writers.
Ever since the series lost major writers because of "differences of opinion" the series has turned from bad to worse and now it's barely watchable.
Negan is just unjustificable, it's not that he is not a good "bad guy" is that it's ridiculous. If anyone can sneak out like that on his fortress, WHY THE HELL ISN'T HE DEAD ALREADY?. The whole "plot" of settlements getting together to fight negan is preposterous and the series is trying so hard to push the idea of "we are all negan" so we, dumb enough, do not question that it is just stupid to begin with.
And this all started with Negan... so I'm gonna say it for once: I HATE NEGAN. It's a stupid character and since it's a stupid character it forces the whole world to behave stupid to justify it's existence.