Riot, can you do something about the "boosted" harassment in normal games?

I was D5 last season and currently Plat 2 for this season but whenever I play ranked it matches me with Silvers. Which wouldn't be bad if I didn't get singled out EVERY game for having a Diamond border. The past two games I've been harassed right out the gate, literally before the first minute mark I was being called boosted by the people on my team without even having a chance to prove my skill. This also causes the enemy team to camp your lane after you get lolkinged and is generally a really toxic experience.

So, "boosted" and other general harassment really should be a more heavily enforced verbal harassment punishment. It would also be nice if normals elo reflected the ranked skill of the player a little more. I'm not even asking for an exact 1 for 1 but why is a S5 diamond getting matched with silvers every game? It makes normals a really unfun experience overall.