Davis was fighting for states rights and was painfully aware of his limits. There is no record of Jeff Davis usurpation.
I don't know of any specific examples of Jeff Davis behaving as did Abraham Lincoln, but I am assured that Jeff Davis was "just as bad", as if that's some sort of argument in favor of tyranny.
These guys make funny arguments anyway. They constantly talk as though the entire war was fought because "Slavery BAD!!!!" because if they don't have that, it looks like what it is; A forceable assimilation in the manner of the Soviet Union occupying Ukraine. A deliberate denial of people's right to self determination.
The war was actually fought for one and only one reason. So that Washington D.C. could continue telling other people what to do. This is where and when FedZilla was born.