@Agent6 TNT Evilution is bloody terrible.
First of all it has soooo many incorrect designs and even glitches. Then it has a load of maps that are just to piss everyone off / sabotage the WAD. For example, Map22 has a set of pointless secrets that I have no earthly idea about WTF is the point of them and it even has a secret inside the exit that when you try to reach it you'll leave the map. Then Map27 is just unfair with a load of enemies and no health or space compared to the required amount of health/space for such map. Also, TNT has a concept that I don't understand, and Map31 is impossible since the yellow key is multiplayer only, which is something else that I have to add to the inbred list. Furthermore, it only has 5 really good maps, while the other official WADs have more than 20, and the boss level (Last Call) features the dumbest music track (Into the Beast's Belly) that anyone made.
P.S. If you wonder why I am so similar-opinioned that's because I'm a big fan of AltimaMantoid and BigMacDavis and several others