Fix LP and MMR

I am constantly the only one on my team going positive or getting any objectives at all. I cant get out of bronze because I am constantly getting dragged down. I cant carry 4 people who are constantly going negative every game.Its not possible to carry every game unless you get to way higher ranks. Im not great but I am really sick of getting grouped with 4 people who are always terrible. last 3 games I have jungled, every lane has lost no matter how many times I gank. I cant do it. I am sick of getting 16 LP for a win and losing 20 or 21 every time. This is fucking stupid. This game is barely playable cause its not possible for me to get anywhere because of getting dragged down. Why every game do I have to play with useless people? Why does MMR stick me here? Why does my LP not make sense. Someone answer my fucking questions.