Traditional helicopters work extremely badly with keys, because there is no 'zero' pedal position for yaw to be stable*. The problem is that your rotor speed is constant, but the torque that the tail rotor has to counter is not, so the yaw input to stay straight is dependent on what you are doing. If you try to climb you will increase the torque, and need more rudder to counter it and remain at zero yaw. When you do counter it, you are then applying a sideways force with the tail rotor, so will accelerate sideways, and you need to roll a bit to compensate for that.
Coaxial helicopters are much easier to fly with keys, because zero yaw input has the same result in all flight regimes, and you don't get randomly pushed sideways. All helicopters do take some learning and practice, but are not that hard once you figure it out. Precision landings with keys are a challenge, but even they are possible in a coaxial.
*This is why they do the trick with the sum, as it means that things will eventually stabilise in if you keep doing the same thing, but it still means weirdness will happen when you make a change. The alternative is that you would have to sit at something weird like 0.3 yaw input to stay straight, which is fine with unsprung pedals, but impossible with keys.
As for why power is so hard to get right; hovering takes considerably more power than moving, so if you 'fall off' a hover, and start drifting sideways, you are going to be getting additional lift and balloon. If you aren't paying attention and lose airspeed without adding power, you will start to drop like a stone.
TLDR: Yes, everyone has those problems, but they are real quirks with helicopters, not bugs in SP.

@F104Deathtrap [gyroscopic precession](https://en.m.wikipedia.org/wiki/Precession#:~:text=Torque%2Dinduced%20precession%20(gyroscopic%20precession,rotating%20objects%20can%20undergo%20precession.)
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Okay I don't know why this link isn't working lol. Just copy it

@jamesPLANESii How would retreating blade stall cause pitch-up?

@T8flightcrafts Yeah you're gonna have a hard time by flying ithem with your keys

@F104Deathtrap Because of gyroscopic precession, it actually causes the helicopter to pitch up irl

@jamesPLANESii ok thanks

@F104Deathtrap it is apparent i have no clue of how a helicopter works. thanks

@jamesPLANESii just flew the gator II, no idea they updated it. it does fly well and i think one of my problems is I fly with the keys most often, but when mouse with joystick is enabled, it becomes much more able. thanks

In real life, helicopters are really freaky. For instance, (unless it has twin, counter-rotating main rotors) the faster forward a helicopter goes, the more it pulls to one side. This gets so bad that its top speed isnt limited by the power of its engines but by how hard you can pull in the opposite direction to keep it going straight.

To properly control a helicopter you need a joystick, rudder pedals, a throttle and a "collective" lever. So if you're just using WASD or thumb sticks, you're going to need to take some time studying the controls.

@X99STRIKER The default Gator 2 flies great, and has no gyro @AviationCat007
Imo the Gator Simple flies even better. Those are the first I can think of

both

If you know of one thay works without gyros, a link would be nice @jamesPLANESii

I havent found a helicopter yet that doest either, require gyros, or be absolutely incapable of flying @jamesPLANESii

@jamesPLANESii yeah may I have a link also please if not that’s good :)

@jamesPLANESii can you link a good one? I never get em to fly well either.

Also I find most people don't know how to make them fly properly either, which doesn't help.
For a start, they don't need gyros lol

I recommend flying them with mouse as joystick or getting a proper joystick with yaw. Then they become real easy and super fun.

Helicopters fly surprisingly realistically in SP. The only thing that isn't so realistic is the rudder, since they work by the sum of the yaw rather than directly inputting the yaw, but that's fixable.
Helicopters don't fly anything like aeroplanes, so yeah they take a little practice lol.