To win against zhin, you need better position(high place) and good eye. Look at zhin loadouts first. Dont attack when zhin use counter. Fighting zhin is similiar like fighting koga, both are confusing. But in reality is not, as long you watch zhin.
Pick champions who are midrange or short range since strix will have to move his scope much more to keep up with you. Good champions are Skye, Jenos, Viktor and Tyra. Since they have massive DPS short range and their drop off is not that bad.
Do not hold the fire button when playing as Fernando. Your weapon deals damage over time after each hit.
Tapfire instead, so you can get value out of the DoT and refill your ammo in between shots.
In the start of a round, go near the objective but stay behind and wait for around 5 seconds, then use Scout to determine which way Skye will flank.
This also directly counters Stealth.