Made it to the final round twice this year, rejected both times with zero feedback, and I don't know what to fix

Two different companies, two final rounds, two rejections, and both times the recruiter gave me some version of 'we went with someone whose experience aligned more closely.' No specifics either time. I can't tell if it's something concrete in how I'm answering questions or just genuinely close competition that went the other way. Starting to second-guess everything about my interview style with nothing actually pointing at what to change.