I need help with climbing back up

How long should I wait between ranked games? Every single game I've played in the past two days, I've had 3 out of my 5 teammates feed really, really hard in lane. Then through out the rest of the period of the game, people consistently get caught despite us having really good vision on the map. I'm not going to push it and claim this is elo hell, but to be consistently seeing my lane opponent get carried and I have yet to have a game where my team is actually better, it is getting frustrating. I was plat 5 3 days ago. I've since then been demoted to Gold 2. I've never seen anything like this. Even when I smurf, I don't see a consistent string of games where, 10 minutes into the game, I'm something like 1-0 or 0-0-2 or something and we're down 12 kills to 4. I'm just wondering, how long should I wait before I play ranked again to fix this absurdity of a streak.

Also, to give an example. I had a game with Nocturne jungle who refused to do dragon while I juggled their jungler and top laner on top. They had a 4v2 at dragon and Noc didn't want to take it. Then when I'm pushing top and our mid laner is dead, and they have 5 up near middle lane, he calls for dragon and they all get massacred (I did get tier 2 top turret but he got mad at me for not tp'ing into a 4v5 fight, in which they had already fed the enemy ziggs and Sivir). Last two games I had a Brand (same guy in both games) who consistently did not ward and kept over extending and then blaming everyone for not like.. idk going in to save him when we're clearly not anywhere close to his lane. Yesterday had a Master Yi with 15 deaths who kept spamming "I WILL FEED ALL OF AFRICA". Lol, I'm not like that upset about it, cuz I know eventually things will turn around but I'm astonished to get these kind of teammates.