I don't know, it's really tough to say -- If you're reading old texts hoping to glean some wisdom, depending on the context that would definitely be conservative, but depending on the context it might not be. I was just talking about Wang Mang around 30AD, and he spent a lot of time digging up evidence of how imperial china was run 1000 years before he was born based on confuscian teachings from 500 years before he was born. On the other hand, at this point after 200 years of Marx you could claim marxism is conservative (and in fact Xi is really making a conservative maoist argument in his government right now hoping to return to the stricter times of his childhood)

Here's an interesting video on the idea of the left hating self-improvement. I won't claim it's universal, but the argument is somewhat convincing in light of many things I've seen far removed from this particular video including stuff like opposing technologies like cochlear implants that would make a deaf person non-deaf. https://www.youtube.com/watch?v=s6Vf-ry-3rg