@1ronKeys I can understand and sympathise with your frustration on this matter.
However i don't think it is actually a cheat or an exploit if i'm honest.
Lets look at it subjectively for a second, so it's a mechanism that's been around since the games inception, respawn are aware that it's being used as a tactic however nothing has been done to amend it, which essentially equates to respawn acknowledging it as a viable in game strategy.
It can't be argued that they're unaware of it either as b'hop healing, another historically popular tactic was deemed as an unfair mechanism within the game and subsequently patched to no longer be possible (Unless you know the work around ;p).
I honestly can't see anything being done to put an end to crouch spam, it's just one of those things you're going to have to accept as part of the game and counter it accordingly.