When I play a normal game I dont want to play with someone who is two tiers higher than me in ranked
When I queue up for a normal game I'm looking for a challenging game but not something like this. I was queued up with my bronze friend which skews the MMR a bit. However the difference between gold and diamond is imo bigger than bronze and gold. Now the reason this game was allowed to happen was because one of or both of the silvers were queued with a diamond. This isn't the first time this has happened either. In fact in the past few days I have been consistently playing with diamond or against diamonds in my normal games. This isn't fun. If I was looking for a super serious game I'd queue up for ranked.
edit: lets' not mention the fact that there is a 239 point difference in MMR. I'd rather wait a minute longer to play a fair match than for it to take 30 seconds to slap together two unequal games.
tl:dr you're matchmaking system sucks.