Androxus loses because Zhin's kit is just slightly better. You can't miss a shot or you will die in most 1v1 situations. Even if Zhin loses the 1v1 somehow, he could just retreat to his team with Billow. Save your reversal as a last resort.
If an androxus attempts reversal don't go to counter stance instead just wait a small second and then whirl and go behind him. Whirling will surely damage him no matter what and then suddenly being behind will surprise him and allow you to takedown
I know this one's a bit vague, but it really comes down to your playstyle; skilled Androxus players rely on split-second timing. Try and use this to your advantage; usage of specific parts of your kit at the right times can help you a ton.
If Androxus uses his Reversal (he will), use your just before he attacks you with it, then Whirl to go right behind him. If he isn’t pro, he’ll get confused: you can take advantage of that to finish him off.