youre much better off making a new account if you want to climb this season
i placed on my main 4/4 bronze 1 with +22 lp and it fell to +16+19 as soon as i started losing some just before silver 2
on my hand-leveled smurf i went 4/4 and got bronze 2 but i was getting +34 lp and skipped promos to b1.
so if you dont want the system to force you in a past elo, make a new account and have fun climbing.