Looking up someone on OP.gg, or any other site, to see what rank they're in and then belittling them in the post-game chat does not instantly make you a better player. You sound like an entitled brat who thinks they deserve to win just because your rank is higher. I've played over 2500 normal games since 2014 and I hardly play ranked, mostly due to the fact I have more fun in normals; however, just because my actual rank is Bronze 3 doesn't mean that I'm A) A terrible player or B) have no clue what I'm doing. Stop Rank shaming, take the L, move on, and stop making excuses as to why you lost.
Edit: I should have been more clear, the game this happened I won and the enemy Support started the whole rank thing.