20x4.0 fat bike with Bafang geared hub motor (low torque)

Hi everyone! I have a 20x4 inch fat bike with a standard Bafang G062 1000w geared hub motor, and decided to switch my controller to Flipsky 75100 Pro v2 as I wanted to get more power and speed. My old controller had only 23 Amps. Since I'm totally new to this, I got the classical "low torque" problem. Maybe some of you have the same motor, or you can recommend what settings should I tweak?

Im on FOC, and already tried Ortega Original, BEMF Decoupling. No luck. My battery is 52V, 14S4P, 20Ah, 50A BMS

Any help is very much appreciated.