Honestly, Pupa. This anime to me had a terrible and at times laughable plot. The animation was alright but somewhat goofy. Same with the voice acting. Scaling this anime to some of the other anime that people brought up in this thread; it doesn't really meet the mark as a really horrible anime. However, it is the worst I've seen.
Me and my friends actually watched it in a discord call and we made a comedic fandub of the first episode after viewing it. Unfortunately, weeks later my computer's drive corrupted lmao so the brilliant fandub we made went into the ether.
https://myanimelist.net/anime/19315/Pupa - Link to Pupa if you want to actually watch it.