MMR bug?

Just had a normal match with my enemy being a diamond 4, a silver 2, an unranked, a gold 1, and a plat 3. Something could be acting up, also most sites cant tell mmr anymore. Is this a bug? Cause I can say it wasn't fun for my unranked ally to go against a Diamond, whilst also placing myself against an unranked and a plat. Please look into into this if possible, Cause having matches like that are not fair for anybody. Its not fun to have a match too easy or too hard, so why is it so mixed?