I personally didn’t like the way Mutants & Masterminds went after 2Ed, but it wasn’t so annoying that I hated it. I simply didn’t buy any of it.
But when HERO (my favorite system) released something called the “Fuzion” edition? It was produced in partnership with R. Talsorian Games.
I felt betrayed. I was wondering why it existed and if I’d ever purchase another product. Fortunately, it was short lived, at least, as a “Champions” product line. I think there were a pair of supplements, and that was it. I can’t remember what I bought in the line, and I’m not sure I still own it. As I understand it, there’s a few games out there that use the Fuzion system.