I have been playing AH 5 or so years now. I am currently using the Saitek X52 as well, and know many others that do too. I have been using the X52 for over a year, and consider it the flat out best stick I've ever used. It is not your problem.
There are 3 things you need to look at.
1- Make sure your stick is mapped correctly for all flight axi's, and flight functions. Do this on the clipboard, undr Options, Controls, Map Joystick.
2- Make sure your stick is calibrated, both in Windows, and in the game. Sounds like you know how to do this.
3-Lock your tailwheel by holding the stick back about 1/3-1/2 way (up elevator) during the first part of your take-off roll. The tailwheel is a free-turning castor type deal, kinda like the front wheel of a shopping cart. Without locking it, it is pretty difficult to control for a new pilot. Locking it will reduce the yawing you are experiencing, but the wheel itself will still roll freely.
Once you have sufficient forward speed to make your rudder effective, you can ease the stick back to neutral, before lifting off. That will allow your tail to lift, and keep you from lifting off too slow and "wallowing".
I would recommend sitting on the runway, and using your views to verify that your ailerons, rudder, elevator, and flaps move and function as you would expect before even bothering to turn the engine on. If not, you can continue to fix them while sitting in the plane by bringing your clipboard up. If they aren't doing what they should, don't frustrate yourself by trying to take off. It won't work.
If you can't see your rudder and elevator while in the cockpit, you need to adjust your views. Trust me, if you can't see them , you also won't see the bad guy behind you, and you will soon be taking off again.
To adjust your views, first map them, and then adjust them. Some are mapped already, but not all of them.
I recommend you map your lower center HAt switch on your stick to views, and one of the buttons on you throttle. I like the button #7 on my throttle as "Look Up". It is the button your left thumb sits on.
On the hat switch, map your views like a stop sign. Look left/right, Look left front, right front, rght/left rear, and look back. Pushing the HAT switch straight forward should be mapped as "Look up Front". Using the HAT switch to look left, while holding the "Look Up" button with your left thumb, will allow you to look "Up left", etc.
Next, and very important, is to adjust every view, for every plane. I do this the first time I fly any different plane. You can even do it while climbing/flying to the fight. Once done, it locks the adjustment in your game folder, and saves it.
Do this by holding a given view on your HAT switch. Use the four arrow keys to slide your head left/right, forward and back, for the best view. Use the "Page Up" and "Page Down" keys to slide your head up or down. Once the view is adjusted to your liking, hit the F10 key to save it. You need to save it with F10 without letting go of the HAT switch, or your adjustments will be lost before you save them. I mapped the #5 key on my keypad to "Look Up" also, to make this easier. I can hold the up view with my index finger, and tap the adjustment keys and F10 with my other fingers. Awkward, but it works.
You are just experiencing some set-up related frustrations, and will get them resolved. There will be other frustrations, as this game has a VERY steep learning curve. Keep at it though, it IS worth it.
Look me up if you have anything you need/want help with. I am always willing to help.
MtnMan