If a bad comment from a stranger ruins your week, your self-image has its front door unlocked.

If one line from a stranger can take a week off you, the stranger is not really the problem. Your sense of yourself has been left open to anybody who happens to be typing, and people type for all sorts of reasons that have nothing to do with you at all. Nobody who actually knows you could do that much damage in nine words.

When a comment lands hard, check who said it and how much they could possibly know. Put the real weight on people who have watched you over time. Reading fewer comments is allowed, and it is not weakness.