Is getting +13 LP and losing 14-15 LP normal at D1 60% w/r all solo?XD

Reformed Russian - Summoner Stats - League of Legends
Reformed Russian / Diamond 1 65LP / 72W 51L Win Ratio 59% / Vladimir - 29W 13L Win Ratio 69%, Malzahar - 15W 5L Win Ratio 75%, Ahri - 12W 7L Win Ratio 63%, Xerath - 4W 5L Win Ratio 44%, Fizz - 4W 2L Win Ratio 67%
So Im currently D1 with a 59-60% winrate only playing solo and Im getting +13 LP whilst losing like 14 or even 15, kinda feels like something is wrong and is really unmotivating to play the game. Hers a screenshot of +13 LP Can anyone potentially explain the reasoning behind this?
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