Not trying to sound mean, but if you really have a problem with this, why aren't you online right now beating people with other characters so they are interested in learning them instead?
Complaining will get you no where, actions might solve your problem.
Personally, I see no issue playing in a ranked setting with a character who is the most effective at the current time. Annoying as it is, it is still a logical thing to happen.
@Oizen6X Dude, I know you mean well, but have you ever considered that some people use them because they are the characters they gravitate towards? For example, I've used every single character (outside Arcade Mode) and the characters I seem to do justice with are Kratos, Raiden, Heihachi and Dante. And yes, I know how to use combos with all 4 of them because I hate spammers, so I don't spam. Throughout my entire time playing this game, I haven't received one message about me using Kratos or Raiden, so I guess this really isn't a serious issue.