Went on a 18 win, 2 loss streak, and I got into Plat 3

I then won 2 games to put me around 40-47 LP, I then lost 3 games in a row, which put me at 0 LP

At this point, I still have 15 wins over my losses in total games.

I play another game, and I lose at 0 LP, and I'm demoted without any safety net what so ever.

My MMR is was either normal or higher than average because I was playing with Plat 1s/2s and a Diamond 5 in one game.

Now I'm demoted to Platinum 4 75 LP, where I have to win 4 games to get back to 0 LP Plat 3.

This is 100% BS, I shouldn't of been demoted after such a large win streak, it should of given me a safety net of at least 1 game before demotion.

Edit: And yes, if you're wondering what my LP gain is, when I win 19-22, if I lose 16-17