Seasonal difficulty broken

That's why have been in the true role and always will, was sure had been either from the start or at least before leaving the Ship, but people keep telling me it has always been lvl 10 before you could change

It shows that clamping in this game isn't done well. CoH, STO, GW etc. all have scaling content (which clamping essentially is) and it worked/works well with those games and it improves longevity of content (of course those examples also come with scaling rewards and not something stupid as a relevancy window). There is a huge difference between a bad concept and a bad implentation of a basically good concept.

As for the ones getting past the seasonal with no problem: Clarion copycats 3 of 4 powersets per run (2 of Fate, Raven, Black Adam and Tala). It is very well possible that the "destruction" some people experience is linked with just a single powerset of those, and if it's not picked, then the run is easy.