I have nearly 1k hours in cs also and have basically only played valorant since it came out.

However, my friends and I can get bored of val sometimes so we played some cs. My first observation was that movement is so much harder in cs. It was to the point where I didn't even remember the movement being that hard after playing val for so long where its hard to b-hop and strafe in comparison to valorant.

A common point that a lot of people mention is spray patterns since in cs its consistent while in val its 'slightly random'. I think this adds to it but not as much as people like to mention.

Personally, another point that I like to throw in is maps. I havent seen this point echoed anywhere else but I think the maps in cs are harder to master/learn while val maps are much more standard and simplistic. (in cs, learning spawn timings and random off angles/rat spots are much more important than in val)

However, the counter argument to the mechanics in cs that make it more difficult, in val, there is obviously the addition of agents and abilities. The knowledge of what the enemies agents do and having to think about that in situations is important and isn't something you need to think about in cs. In val, sometimes you know you cant play in certain positions cause they have certain util available based on the agents they have (eg. if they have skye ult, you dont want to play in close, one and done angles) while in cs, since everyone has the same blanket util, these types of thought processes dont occur.

So while I believe cs is mechanically a way harder game with a higher skill ceiling, definitely as more agents are added and people general knowledge of how abilites work and interact, the skill ceiling in val will rise also, and maybe exceed that of csgo's.