You haven't had to deal with determined birds that are intent on doing damage to your drone.
If you ever do engage in evasive action with birds that are serious, you'll learn that climbing only means you have put your drone further from safety...
Your pictures will always look a lot better if there is a subject rather than just background that's so far away that there's no way to tell anything about the image quality.
In photography, rule 1 is ... Have a subject.
And that goes double for...
Your guess as to what happened doesn't make sense.
A motor froze ??
Have you ever felt how hot your motors run ?
They are the last part of a drone that will freeze.
A motor "failed" ?
How do you know this?
What did you experience that led to...