So how do I deal with feeding teammates? (not a qq, looking for advice)

I usually play midlane and I win my lane 95% of the time, sometimes I win hard, sometimes only 15-20 cs ahead but no kills (I still consider it winning lane tho). But then, you know, you get that botlane, or the toplane, or both, dieing 2-5 times in lane. Okay, I get it, it's soloq, it's the game. But how do I deal with that? I try to communicate with them, being nice but not too much, but they won't listen it, they won't respect the fact that they are weaker than the opponent and will keep skirmishing/teamfighting/greeding on a couple cs. How do I deal with that? I usually try to roam, stall, farm up, catch opponents overextending, but it's not enough. Am I missing something? Or when I'm into such games I have to accept it's lost, and start over? <- I hate to do that, I play the game because I enjoy playing, winning or losing doesen't really matter (ofc I like to win but it's not the point)

I'm playing in low gold.