Trying to get flex to gold has me believing in elo hell.

I haven't played a decent chunk of silver or lower games in years, I like to smurf but I typically get to gold elo either in placements or a few games after. But I hadn't done any flex q on this account till after the new system and it put me in iron and... I can't win these games. I want to get gold flex so I can flex with people I know on it but IDK if it's possible to do. Maybe it's because its flex or I'm just getting unlucky, but the amount of unwinnable games is basically... 50%, due to trolls or people who just... literally provide nothing from start to finish except gold to enemy team. I can't find anything that effectively works, I can't ping them, I can't talk them into doing something useful, they're just going to do their own thing that they've always done thats kept them in super low elo. If I try splitting, they'll just get caught out and die, and then a few of them can come stop me, having all abilities still up. The only way I can imagine winning these games is if I could actually just 1v5 the entire enemy team despite the leads they get off my teammates. If I'm missing something about carrying hyper low elo games, lemme know cuz I don't fuckin see it.