Am I the only one?

I bought a kit from StevensAERO. The kit (IMO) was extremely well constructed. Every piece went together with no extra sanding or trimming, I was impressed. I took my time, made a few mistakes, but thought I had all the mistakes corrected (except for a few aesthetic ones)but the plane flies like a paper plate. I don't even know what the problem is. It fights me to turn to the left. When I force it to make a right bank, it stalls and does a nosedive. It is very unpredictable. After 5 minutes in the air, it now has broken landing gear.

I'm sure this is not the fault of the kit.

Everything to my eye looks straight, except for the tiniest warp in one wing where it meets the fuselage. It seems very small to metoo small to cause such erratic flying as this, but what do I know.

AnywayI'm frustrated and disappointed. Anyone else been there? How many people give up after a start like this?