LP Gain/Loss

Hi!

Just a question as im not sure why its such a massive diffence ? When i win i gain +20/22 LP but when i lose i lose -30LP? Unfortunetly it wasnt a great game as I did lose a lot of jung objactives (almost all) but I feel like I shouldnt have lost so much ? Thanks.

https://preview.redd.it/zfisik4dea0e1.png?width=897&format=png&auto=webp&s=298763ec14a6284dad3d54cd52701a51dd14fcce