Supports (and other role champions)

Look, I'm not sure if you guys noticed it, but I have. Lately, all I've been going up against bot lane is Morgana or someone like Thresh. Seriously, it's like these guys are the only supports in the game right now. They're just so good right now, they stand out against all other supports. I'm tired of going against the same people over and OVER again. I'm not saying they are broken or anything, I'm just saying that these super popular supports definitely need at least A BIT of tweaking because there's obviously something that's making them so popular and what makes a champion popular is if they're strong. For example Thresh vs. Blitzcrank. Without hesitation, anyone who have common sense and logical reasoning would choose Thresh just because he's simply better. His pressure is insane compared to Blitz and has an incredible engage/disengage kit. It's just unfair for Blitzcrank players because Thresh just has so much to offer. Then the Blitzcrank players would move to main Thresh and now there's barely any blitz players now. This is just a scenario, as there's still a lot of Blitzcrank players, but this did happen to many other champions. I just hate how there's so much champions cast aside, not even supports but champions from every role are cast aside.

Think about it like this. What's the point in making new champions if all the players are going to do is just play a select few champions that are above all else?