Instead of Lovecraft, Beyond Re-Animator looks to Hammer horror films for inspiration. In particular, it’s mining the territory previously explored by Frankenstein Created Woman and, even more so, Frankenstein and the Monster from Hell
It seems like the middle story is always the crappy one, and while I understand that dropping the bad story in the middle means you can start and end strong, it also kills momentum
Dagon walks the line between horror and comedy more deftly than did Re-Animator, which tended to give in with youthful exuberance to its more outlandish tendencies
If you can roll with the goofiness of a demon anti-hero who seems to be taking acting queues from Jimmy Walker, this movie is fun enough, stupid enough, and warped enough to be a pretty entertaining, dumb time.