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This is likely not useful, but whatever:

Brushless motors shouldn't really be easy to burn.. especially with tiny hawk, it doesn't really have much power. Brushed motors suck.. brushes wear out, if you get stuff hot surfaces can get messed up and poor contact is made and things heat up oddly.. just trash. Brushless motors should basically just work.

Burning a brushless motor basically means you heat up coils to point enamel starts to melt/burn and coils short out .. the coil looks like it actually burned, it's black and smells like burning. Definitely happens but on stock tinyhawk I dunno, seems pretty unlikely to me.

Bearings go bad.. will make motor not spin as freely.. but it should still spin, its more as rpm goes up the vibration just gets insane. You should feel a tiny notchyness when turning motors from magnets, but if you feel any 'slop' kinda like the bell can sorta wobble a little..I dunno how to describe it.. but that's like a worn out bearing. Generally caused by crashes where motor takes a hard hit.. kinda hard to happen with tinyhawk with frame protecting motor.. but lots of hard crashes into solid objects bearings do go bad.

Motor shaft bends... again hard hits.. if when you spin motor if you look at it from bottom y ou should see a small even gap between bell and coils, like the magnets and coils. As you turn motor that gap should be pretty constant, if you ever see that gap get smaller such that two touch and rub.. might have a small bend in motor shaft. Happens from hard hits, again kinda unlikely with tinyhawk. With super tiny motors I'm also a little careful when installing the props, push straight down, pull straight up.. don't apply force at slight angles as that torque will be trying to bend the motor shaft.

Magnets come loose.. when looking from bottom you see that gap between bell/magnets and coils.. those magnets are held to bell with glue. If a magnet comes loose you'll see that nice even gap except you'll see one spot with no gap and the magnet is sorta up against the coil dragging. If you're going to throw a motor out anyways might as well pull it apart, pull off bell and look at bell and coils.. if any magnet seems shifted at all thats a problem.. if you look at coils if you see drag marks that's probably caused by a magnet that's loose scruffing up coils. Something was like physically wrong... basically magnets or motor shaft.

And then IMO most common issue with tinyhawk.. basically hair getting wrapped up in motor adding friction that makes it harder to spin. Combination of the frame and props.. I dunno what it is really but thing just sucks up hair. Any time I crash behind some furniture that doesn't get vacuumed frequently I got some tweasers I flip it over and pull out any hairs I see before they get tightly wound up. Something like these:
https://www.amazon.com/dp/B00BAYWOFY IMO this is most common issue with those motors.. little tiny motors have so little torque, doesn't take much garbage getting wrapped around adding drag, it might even still feel fine to spin in your hand, but just that tiny bit of drag is enough to cause esc to be unable to get motor spinning from a stop. Like can't stress enough how little it takes, literally one hair can take out a motor.. to be fair my gf's hair is kind long but still.

I'd try to figure out exactly what is going wrong... you say motors keep burning up but .. are you sure? Just seems unlikely to me. I'd be careful to interchange 'not working' with 'burned' .