Hax jump bounce issue

[|HP|]

I don't spam the keyboard, I only press it twice. This is how I do it:

I press SPACE+SHIFT 2 times quickly (jump-crouch+jump-crouch) and the bounce ALWAYS occurs, but I try cancelling it by staying in crouch position however, this only works about 3 times out of 10. I never use bind. Bind is for noobs (IMHO). But I just wanted to know if there is a 100% way of cancelling the bounce (maybe I'm pressing the buttons in the wrong order I dunno, I@m only learning).

Everyone says that "oh no no im not using bind im just pressing 2 keys at same time" 
You should be doing it the only proper way and thats with pre jump! 
But ofc why use that when it requires more skill, is slower and more fair.

So to answer your question

1. Use bind and press crouch or jump right after (what sveark said).
2. If you think bind is for noobs use pre-jump and not this "2 keys at same time" crap.