I think your experience has been a constant of most Apple products for the last 22 years or so. Some people have no issues ever, some people have constant issues all the time. That said, I loved the Cinema displays and they did have a good track record, but if memory serves, the Thunderbolt Display variant was notoriously flaky [0]. Since they've put out so few external displays, it does stain their reputation a bit.

[0] https://superpixel.co/apples-thunderbolt-display-worst-apple...