High/Normal MMR, Low LP Gains?

Mr McLovin - Summoner Stats - League of Legends
Mr McLovin / Gold 5 62LP / 136W 127L Win Ratio 52% / Miss Fortune - 93W 65L Win Ratio 59%, Lux - 18W 14L Win Ratio 56%, Wukong - 9W 7L Win Ratio 56%, Tristana - 6W 9L Win Ratio 40%, Jhin - 3W 8L Win Ratio 27%
Hello, so I'm having a problem. I have been playing ranked, was in gold 5. went on a losing streak and ended up in silver one but then I went back on a winning streak into gold 5 again, now sitting at 40 LP. MMR according to OP.GG is Gold 4 and I checked my win percentage in ranked and its 52% with 116 wins and 109 losses. Yet, every game no matter how much I win, I keep continuing to get 14-16 lp for a win, and 21-23 for a loss. My buddy who is in G4, gains 22lp for wins and has normal mmr so what is going on? Someone help cause this is very frustrating and its making it IMPOSSIBLE to rank up. Basically I have to win 2 games for every 1 loss :D
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