The quadcopter flies unstable, what's the problem?

Question

Quadcopter

I recently purchased a cheap quadcopter, of course, I had no experience with this aircraft before, so in the first days the beam flew off, glued, I noticed small beam shifts, but did not attach much importance to this, after launching the quadcopter, it behaves very, very bad, the flip does and immediately to the ground,
the control slows down, tried to calibrate - it did not help.

Answer 1

most likely, you bought a disposable toy with collector motors. For such, in addition to the lack of traction initially, any structural defect leads to a deterioration in flight performance and it is usually impossible to fix this. Also, the motors and batteries have an extremely small resource.