Peekers advantage to this degree goes against what a cs game is supposed to be. I think of cs as a game of gaining and losing control of diffrent positions in a map. The way to take space is by tactically using utility or by playing with teammates to get trades. However, in cs2 you can just gain control of the map by just swinging all angles.
In this video in 27:35 FalleN and dev1ce say "In CS2 if they peek perfectly you have no chance". Because holding angles is so hard in this game, the only thing you can do when holding one is to jiggle peek and pray that you catch a timing where you are the one actually peeking the peeker.
Playing the game in high premier ranks or faciet lobbies feel like a dm where you need to peek someone before you die. This clip show perfectly what I am talking about.
This is the biggest issue the game has in my opinion. At least gameplay wise.