It needs to be said right away that it's hard to judge both seasons of the show as a whole, as they are very different in both visual and writing quality. I will briefly cover season one, but what I really want to talk about is season two.
The original, first season of Evil Con Carne is as close to the definition of an "okay" show as it gets. The animation style is quite simple, humor is not stellar, but can get a giggle out of you sometimes, characters are fun to watch, but not ones you would get too attached to. It does decently well in parodying the most common supervillain tropes, sneaking in some direct references to other popular shows/franchises, as well as mixing in some entertainingly absurd elements. I am actually quite fond of a few unique ideas featured, primarily the character of Destructicus, Hector's time-traveling future son. The show had potential, and could have developed to be quite entertaining had it lasted for longer. Not something I would put on my "recommended" list, but a fair 5/10 rating. Unfortunately, however, a lot has changed between season 1 and season 2.
I have never in my life seen a disaster as breathtaking as season 2 of Evil Con Carne, and I feel that watching it could cause permanent psychological damage. It is possibly the most incoherent mess I've ever come across, where jokes die before they are finished, scenes come from nowhere and lead nowhere, and in general, it's just really, really bad. With no exaggeration, this season feels as if writing, story boarding and voice acting all took place at the same time, in one room during a single one hour long work session. Pointlessness of some jokes and references makes me question if anybody proof-read the script. At times it almost seems like it was made as an excuse for the story boarders/animators to draw smutty pictures, as this season takes the "Ghastly is enamored with Hector" character trait, amps it up to 11, while simultaneously adding more detail to her character model and taking every opportunity to put her in sexy poses or costumes. It is honestly the only thing anybody, could ever consider a "positive", and it is not nearly enough to turn me. Season 2 of Evil Con Carne should never be watched by anybody sane of mind. It earns a 1/10, and I am glad to see that it was cancelled as soon as it was.