trophies come and trophies go ... i got days where i’m just trying out stuff and shots ... in ladder drop 2/3/4/500 - don’t care ... you climb up to where your place is within a day or two again ...
on the other hand for a personal high you really need dedication, concentration and maybe on top to hit a good / lucky streak of opponents ... i had one (lucky streak of games) some seasons ago ... since then only once came close to my PB once, which is just shy of 3k
but the more games you play the higher the probability to get lucky/not so fortunate opponents consecutively and thus an outlier in your ELO ...