the huge amounts of updates and rapid changes combined with the nature of abilities and discovery of new set plays and set ups make sustained success difficult. CS:GO has barely changed since it was released, hence the reason why there were eras of constant dominance at times, like Astralis, NIP, and NaVi and Liquid to a lesser extent. In valorant, the constant meta changes combined with some complacency from those at the top of the game at that time (cough TSM cough) leads to less eras of complete dominance. Sentinels didn't get aim diffed at Champions by KRU, they just got outstratted and couldn't adapt to the meta properly. TSM got lost in the power creep and got caught resting on their laurels as everyone else developed past them. Specifically on the topic of TSM tho, I think their problem is more to do with Wardell, especially before Chamber. When he played Jett, he struggled to find value without the OP bc of his average level of rifling, especially compared to his OPing. Teams could just play around that, now to a lesser extend because of his Chamber play, but it still is there.