My first tiny trainer did not do well.
Every time I tossed it, it pitched to the right. I would give it left roll and the plane would roll hard right and nose into the dirt. It was ugly.
I had my aileron channel reversed. I checked it 30 times knowing how it should work and I still got it backwards. When I gave the plane left stick to counter the left tilt, the plane went harder to the left and being so close to the ground, it was not recoverable. If you have your elevator channel reversed, when you pull back on the stick to raise the nose you would be raising the tail instead and pitching face first into the dirt. I did this over and over and over and boy was it frustrating.
I took my plane to the local club. The trainer guy there reversed the channel, added 60% expo and reduced my rates to 50%. He then tossed my plane into the blue under full throttle and trimmed out the left roll with a trim switch in the first pass.
Now when I toss my tiny trainer into the sky, I run WOT (1806 2280kv and 6030 Gemfan on 3S) and my bashed and crooked 355 gram plane flies a nice straight line. The plane will fly by itself with my hands off the sticks and it took that guy at the club all of 6 minutes to get it this way.
If you have a local club, go there. If not, post video of the problem. Let us see in video your sticks and your flight surfaces moving in the same shot so we can confirm that you don't have a channel reversed (this is soooooo common
). Show us in video your CG with the lipo in place. Let us see the front of the plane so we can confirm that you have the motor tilted to the right (not down) to offset torque.
You need to run high expo and low rates if this is your first time flying. Tone the TT down by cutting the rates to 60% and running at least 30% expo. If you don't do this step, the tiniest touch on a control surface will have huge and dramatic effect making the plane HARD to fly. You are not going to trim out this plane at 100% rates. It's just too twitchy.
Most likely you have a CG problem or a reversed channel and too high rates with not enough expo or, like I did, some combination. All are simple to correct VERY common newbie issues. Your local club has that guy who can fix this in 5. Otherwise, post some video so we can see the issue and be more help.