trippa its hard but there are at least 3 ways to do it. 1. just press crouch for 1 tick (VERY hard but physically possible esp with rapid trigger keyboard)
https://i.imgur.com/UsJ4Kbl.png
it's still possible and is generally better to learn how to do them manually so you can decide when to ctap when its optimal, but even with that this ban just negates a way that I can do them consistently without twisting my hand in horrible ways or completely relearning how to jump with different binds. It's not necessary and just makes soldier harder to play, when it's already one of the harder classes to find real value on at higher skill levels where this tech is more necessary