The ability for more inventive theorycrafting and interesting combinations doesn't mean its "harder strategically". The CS:GO equivalent to valorant's abilities is utility. The ways you can combine utility are a lot less varied than the ways you can combine valorant abilities, but this is not what we call "strategy", they are gimmicks at best. In reality pro CS:GO is about smart rotations, map knowledge, your IGL's calling, and people finding timings and gaps in the other team's spread across the map (all alongside great mechanical ability of course. Having watched valorant I was surprised because it looks more like overwatch, where the match consists of a series of team fights with different roles and abilities, with these team fights more often than not happening on the retake or site entry. In CS:GO if the entire enemy team has rotated off the other bombsite you're fucked, in valorant it seems to be quite common and not that big of a deal.
As for shroud, he is undeniably upset/dismissive about CS:GO. And its not just this. Ever since he stopped playing he talks about the game with obvious disdain.