How to deal with bad teammates ?

HI, I was asking myself and I could not answer. How can I deal with bad teammates, I usually try to give them shotcalling(s) but they just tell me stfu or just ignore it and go suicide into 1v5. I've sent some tickets to riot so I can see how this game matchmaking works, and then I saw. They don't have one, in 90% i have positive kda, help the team and give shotcallings but, even when I win I win just 17 lp, and when I lose I lose around 19-20 lp. I want to ask you if you feel im right or not, cuz I really want to climb, but I can't with these teammates. And if you got some tips for me, I would appreciate them.
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