Idk what "so bad that its good" means, so here are some good ones that I expected to be bad at first
Isekai Ojisan - an old die-hard sega fan tells stories of his isekai days to his nephew as they play console games.
Kage no Jitsuryokusha ni Naritakute It takes real skill to write a story where the author has the freedom to pull whatever the hell they want out of their ass and have it accepted by the readers. You see this random bullshit pulled out in all low quality stories and it is normally very irritating, but this one was
made for it. This is currently the only story I am reading where I can accept 100% ass-pull bullshit plots and genuinely LMFAO