Stick with GothKrieger.
I had something similar a while back. I had the old, original, MSFFB joystick and loved it for years. Then it went t1ts up and I was lucky to get a MSFFB2 off my boss at work. I plugged this new one in and went flying. HOLY CRAP! I couldn't fly for sh1t. Trying to stay in level flight was impossible, the prop plane was like flying a F22 with the flight control computer switched off, it wouldn't stay still.
So in the end I found that the axis profiles that worked for the old one, did not work at all for the new one. Something you are similarly experiencing now. So stick with it and get the axis profiles sorted and you won't regret it.