> I played 2 hours of targeted practice every day for half a year, but i did not really get any better at the game
well that is extremely unlikely unless you only practiced skills that are useless in game. probabaly you just didnt notice you got better at a lot of things. or it will take more practice to really pay off in results.
throwing a grenade in a live game is not different from doing it on the same map without enemy players, ideally in game you should never even see an enemy while you have a grenade in your hand. for example on B site cache you can often win rounds without even seeing an enemy just by throwing an HE into main from heaven at the start and then smoking checkers door. this either stops the rush or you get 5 players on 50hp jumping out from the 1 choke point that you are covering with your buddy on B.
if you are getting caught out by enemies with grenades in your hand, you are doing it wrong. if you never get caught out, its the same as throwing them on empty map.
not pulling grenades while enemies can peek you and youre not covered by a teammate, is also a skill to learn. its a skill even many pro players can improve on.
you can practice this on empty maps just by checking timings how long it takes both sides to get to certain spots from certain spawns, and learning map geometry, which positions are safe to throw nades from if teammates are covering certain positions, where can you flash people while they are coming around a corner, etc.
>Retakes are a shit way of practicing
i agree, thats why i said "even retake server is better than pugs". 1v1 server much more useful than retake for practicing pushing aggressively or holding vs pushes.