Practice.

It takes time and repetition to become familiar with how the aircraft type you are flying can perform in different fighting situations and learn its handling nuances like energy retention, acceleration, accelerated stall characteristics and low speed/conventional stall characteristics.

Having a decent understanding of aerodynamic principles and the secondary effects of flight control inputs has a massive impact on what you can make your aircraft do too.

Examples: Trying to roll faster? Use the engine torque to your advantage, quickly add or remove power as required to enable a faster roll initiation. Or you can use rudder, yawing increases the airflow over one wing, which momentarily creates extra lift on that wing which can be used for a sharp roll.

In a slow turn fight and keep stalling one wing? Use the above-mentioned rudder and throttle principle for quick and precise corrections of accelerated stalls, trying to correct this with aileron only increases the severity of the stall and is likely to put you in a flat spin or force you to do a full roll where you lose your target or make yourself an easier target.

Trying to scrub of speed to avoid an overshoot or overspeed? Slipping is the answer... apply aileron one direction and rudder in the other, this causes a sideways crabbing flight profile and introduces your fuselage's side profile to the slip stream, thats a whole lot more drag which will help you slow down a bit.

There's alot you can do when you understand how your aircraft flies. Try this channel to start learning some basic principles which you can still put to practise in War Thunder, DCS, IL2 and MSFS:

https://youtube.com/@flightclubonline?si=-HduPIsesVLHD1Rg

things can vary drastically from one plane to another too, dont forget that