LP gain and loss broken?

Now I don't know if this link will work, but I just want everyone's honest opinion on this LP system here. I just got out of a 47 min ranked game that I lost. I went 11/7/21 with 343 cs and (i took the picture before I got it but i got 3 honors). It was a really close, awesome game that i lost 21 LP FROM. How is that even a little bit fair!!! I know that means my mmr is not good but yesterday I would play and win 19 and lose around or 19. How am i supposed to fix this "LP problem" when i lose a super close game that i didn't do bad in and get punished super hard. I know must people will just say this stop your winning and complaining but the Lp system has been screwing me really hard recently! I'm silver 4, push to silver 3 by winning 17 LP per game, get to silver 3, then whenever i lose i lose 21 lp and fail quicker then i gain, get demoted again, push to silver 3 again, ITS A NEVER ENDING CYCLE. I've been demoted to silver 4 three times and got back to silver 3 almost instantly every time but i still lose so much LP I just can't stop it! Does anyone else think it would be nice if you were giving LP or losing LP based on your OWN individual performance? I'm so sick and tired of carrying my team but losing 21 LP, and wining 17 when silver 3 is clearly where I belong.

Please, in the comments below I want to hear your thoughts, your stories, your opinions on this system. It doesn't even have to be a response to my comment! I just want to see what everyone else thinks, I wanna see what Riot thinks.

Thank you for your time