Yeah, the way the stalls are handled on FSX and prior MSFS games is chaotic at best. The Extra300s for example when its speed goes negative after a rope without pointing the nose down, the plane will not stall, it will go around in rapid corkscrews, loops, knots, all the while possibly uncontrollably grabbing alt up to 10,000ft at speeds in excess of 300kts and 10+ Gs in 1minute
...and with maxed out realism ( except G constraints). The long flights, fuel, and engine management dynamics are well implemented but the stalls need a LOT of work. Helicopter's flight dynamics lack a little bit of accuracy as well (I fly them the most), especially for flying backward and the lack of vortex ring downwash or "settling". They didn't really change the model since the 2002 version.
FSX was my main game before AH and I did all the lessons and read almost all the training material the game had to offer. Now all I need is money and time for real lessons.