With the current mmr system, how is someone expected to climb

So first of all, I went on a loss streak and now im not playing my be4st, admittedly. But how is someone supposed to climb losing 23lp and gaining 13? With two wins and one loss you lose 69% of your progress. Good job...? So I got unlucky for a bit, lose all my chances to climb, now my only chance at climbing is dropping from plat once more, then promoting and hoping i can get 17lp a win and lose 15 once again. Literally feels so hard to stabilize before i demote.
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