don't conflate disappointment with self doubt, pro players care very little about any individual tournament and simply seek to make correct decisions in individual hands and leave results to look after themselves
if KQ appears on this shove chart (look at 12.5% ante tab) in SB v BB with 10BB effective then you have not made an error:
https://docs.google.com/spreadsheets...hl=en_US#gid=3
gl and wd on 66/315 in a $320 online - but play smaller, because the other thing pros do is to focus on mtts where they have an edge higher than rake over the field