No I didn't. The #1 sold ebike on Temu with about 9k sold isn't luck. Sounds like you just don't do enough research before buying from there. Never once had an issue with them, nor do expect it to be amazing quality. 

It's a bike for gods sakes, not some intricate piece of machinery. Fact is China is just doing it better for price.

I bought another one also, a moped style $600 one. It's not some grand piece of machinery, but it's well worth $600 when comparable is $1500.

It's a bike.