@4V29LN0n They're similar because they all stem from Chinese philosophical concepts (mainly Taoism.) It's just part of the genre, but that doesn't mean they can't divert quite a bit from the "general formula" so to speak, like Cultivation Chat Group that is a very modern take on cultivation, and Library of Heaven's Path that focuses more on a teaching aspect (both are pretty funny.)
Most of the time Xianxia stories are more focused on Taoism, so if you want something more non-standard you could look up Xuanhuan stories which are similar but go more into fantasy territory. Coiling Dragon is a pretty popular Xuanhuan novel if you're interested. I read it a really long time ago so I can't really remember how different it was from standard cultivation novels though.
I personally think it's interesting that the core concepts can be found in most cultivation novels. It's kind of like the Fantasy genre, even if dwarves and elves can feel a bit cliché after all these years it's not like it's inherently bad, and most people at least try to put some personal spin on the setting.
Honestly, Reverend Insanity's system pretty unique with the Gu worm cultivation already and then there's a lot of other unique points, like the Ren Zu mythology, villainous MC and time traveling, so maybe you're just disappointed that other stories are too standard? You've set a pretty high bar to compare with to be honest.