Curious what others experienced - The moment I start playing a deck on ranked, all of sudden it is losing all the time - got 80% win rates in normal play to test it out - then go on ranked and all of a sudden , I get paired with decks that seem specifically designed to counter the deck I play - I play life gain, the first card opponent plays is a creature that prevents life gain. Or, all of a sudden, I either draw all lands ar none at all - using card draw mechanics doesnt help but confirms this - playing winternight stories - after drawing a land off the top, I draw another 3. Dark confidant? Nice, you draw another land. Weirdly enough THIS mechanic doesnt happen in non-ranked games.

Also, it looks like opponents ALWAYS get to play their combo at the earliest time possible.
Reanimator deck - Impossible to beat.
They always, on turn 2, drop a biggie in the graveyard and they ALWAYS have reanimation spells to play on turn 4. Its like clockwork.

Oh, and when you manage to remove the threat (Ardyn in most cases) - they always immediately follow up with back up reanimation.

Strange enough, most of these players dont seem to be mulliganing - they just "naturally" draw these hands - all the time.