If it's so famous, it should be trivial to gather a bunch of the more egregious examples of general update/upgrade breakage. Again, would you mind linking to them? I can neither personally remember them, nor is Google any help.
All I can find are minor, individual, dependency issues that are common with absolutely every Linux distro. I'm actually a little surprised how few of those Google digs up.
It would be rather worrisome if the foundation for an industry behemoth like REHL would commonly suffer from the problems you, and only you, are claiming without any kind of evidence. So, please, end my "delusion" and show me the error of my ways by showing us these common issues.