Stuck in Gold 1 send help please

I was diamond 1 last season , I am not the best but I am very knowledgeable about the game.

The matches in gold 1 dont feel real , people switching off healer mid game without informing, tank hiding behind healers , dps going 2 and 8. I even had someone say " sorry this was my first game I am using friend's account ". I win 1 or 2 games and then start losing 4 in a row and I noticed that the people I have on my team are usually the same ones I just lost with.

Also every other game there's a smurf that dominates the entire match.

Please tell me I'm not the only one going through this. Any tips appreciated, I play a variety of characters I usually just switch whatever is needed mainly tank or dps.