I am not sure this was always the case with CS:GO.
I know there are servers now that have those type of modes, but I think they have to use some custom server parameters for the physics to make it work more like it used to do.
I remember when I first tried CS:GO coming from 1.6 when it came out, there were no HNS servers as the default physics model really didn't allow for bhops and longjumps the way it used to work. Or maybe, even if somehow it still allowed for those things, the mechanical difference was too big so it didn't feel the same.
In the end I "just" played like 1000 hours in CS:GO and quit the game as there was no real HNS replacement as it used to be. I still played the normal mode for 1k hours as there were a few very nice 24vs24 servers were everyone was using microphone and try-harding.