Another one from the vault; this time I just finished watching Akihabara Dennou Gumi.
First of all, have you ever seen a more 90s character design in your life? Just take a second to appreciate it.
That aside, this anime was a pile of shit degozaimasu desuwa. About 80% of it was boring episodic monster fights (which I would describe as "monster of the week" if there were actually different monsters every week) featuring lots of reused footage and pans over still images, like an incompetently-directed, zero-budget Precure. The handful of filler episodes were some of the least awful parts, but even they mostly suffered from feeling like they had maybe ten minutes of actual content torturously stretched out into a full episode.
When the plot finally kicked in right near the end (starting with a whole episode of nonstop exposition, of course), it would have almost been cool, but by then I'd had about 20 episodes to come to hate the series, so it was too little too late. And it didn't last anyway; the ending was a total disappointment. The good guys who were portrayed as villains through most of it got bad ends; the villain who was portrayed as the good guy through most of it almost destroys the world, then loses to the protags, but then gets off scot-free and lives happily ever after; the mascot characters who nobly sacrifice themselves for no reason come back right at the end, also for no reason; various other nonsense.
The whole thing felt so janky and weird, at first I was convinced that it was some sort of parody or otherwise ironic, but it became clear fairly quickly that no, it was just that bad. Who was it even targeted at? Who could like such an anime?
Anyway, I could go on and on about this one, but that's enough bitching for now. Bottom line, 2/10, do not watch.
 Episode 8, a filler episode guest written by Arakawa Naruhisa, was actually pretty good and by far the best part of the series.