To judge if a class is broken or not please consider yourself this : Are you already reach the peak of your class?
And by peak I mean you better be max level and at least stay in top 50 to said so, know everything about ur class and the class you consider it broken. Try the "broken" class and see if it's really broken. Also try to look at his gears to see who is faster. Speed is critical stat that determine who win and who lose. At least it is for now.
If you don't qualified that you don't have the right to say anything. If you can then please show proof. Screenshot of the broken team, ur team, ur gears, his gears, etc... here and people will help you defeat them.