This season's rank is meaningless.
I only look at loading screen banners. That's what I consider someone's true rank - their solo queue, end of season 5 rank.
Afterwards, nobody knows how you got to your new rank. Nobody knows if you were a premade 4/5 stomping solos, queued with multiple d1/master smurfs, etc. If someone says they're a season 6 plat but I see a silver 2 banner, I consider them a silver.
It shows too. I've seen so many "plats" just get absolutely destroyed both in normals and in ranked by their lane counterparts its not even funny. Sometimes these "plats" are getting destroyed by gold 3's even. They don't even know how to cooperate with the team after laning phase either. In fact, even if they build full tank, they don't even know how to tank properly.
Dynamic queue has destroyed the integrity of ranked.