Nothing you can do, the current state of the game at least on NA feels like a complete coinflip. 50/50 chance you win or lose, entirely depends on which team has that one player, and you all know exactly what I'm talking about. The guy that's 1/9 at 10 minutes and now his laner is comin' for every lanes booty and you can do literally nothing but watch as this player tilts into orbit and, if you're lucky, will just autopilot, but you're almost never lucky and they just start inting. Then they infect the rest of your team who all give up and just ff at 15 minutes, but of course, the 1/9 player will say no to lock you all into the game with them so you have to suffer, and you've just wasted 20 minutes of your life and 15-18 lp closer to demoting. Que back up, flip your coin and hope that one player is on the other team this time.
Now obviously not every game is like that, but a vast majority are. I've been playing since like season 3, I've never taken ranked seriously or even tried, I have played normal for 95% of my time in League but just started playing ranked last season and this season. It is absolute hell. The amount of coinflipping and utter insanity that goes on in Gold elo is just mindnumbing. It is physically painful to try and solo climb at this point when most of your games come down to just getting lucky.
I appreciate the 8.11 and 8.12 changes to make snowball champs carry better, but it's not enough, and it may never be. There is simply nothing you can do but sit back and watch as that one player works their self-destructing magic and you lose the game. The current state of NA is; No one cares or even tries, they first time champs that they think are fun, feed a literal buffet to their laner, either afk or autopilot, lose the game. Rinse repeat.
I'm afraid there's probably nothing Riot can do about it either, other than continue to buff snowball champs, but the community as a whole is beyond rotten to its core and I don't forsee it ever getting better.