Odd LP gains despite good winrate

Hello everyone! I have recently started using this account because my last one is, sadly, permabanned and I accepted that. With topic on hand, did anyone have mmr issues on soloQ even though their winrate is well above 60% in 100ish games played? Will it get better next season when I do placements all over again? Back in my days you used to get 25-7ish LP with such mmr at the very least, while rn I'm stuck with +20 and - 19 and it's making my climb somewhat more difficult. Thanks for reading fellas!
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