When i win i get +14 lp but lose wastes 25 lp ?

at this moment , im silver4 and my MMR is 1328 , i won many games in a row all these games i get +14 or +15 lp but when i lost a single game i got -25 lp , i get S+ to A- each game and my KDA over 5 so whats the problem ? why i get low LP when i win but lose so many ?
Report as:
Offensive Spam Harassment Incorrect Board