You’re allowed to change your opinion of yourself upward.

Most self-assessments are old. They were set back when you could not do the things you can do now, and nothing sends a notification when a description goes out of date. Downward revisions get made instantly and without evidence. The upward ones somehow seem to require proof and a permission slip.

Take one thing you have genuinely gotten better at and say so plainly this week, even if only to yourself. Not bragging, just updating a file. The gap between who you were and who you are is often years wide by the time anybody notices.