I'm pretty sure we all have a list like this - a list of the shows that we have absolutely hated. I realise I can be quite pessimistic about shows anyway, but this is a list of shows that I absolutely do not want to revisit. Often, it's also a list of shows that I don't even want to talk about, meaning this is a somewhat rare chance to delve into the bottom of the barrel.
Creativity is, of course, subjective. What makes something a masterpiece to someone, may be a weird artsy disaster for someone else. If a single collection of anime was to make this divide apparent - it's Genius Party.