I've shared openly about how I've struggled with this. I work on it constantly, and it is the main reason why the theme to my art is "Positivity." I'm working on brain washing myself into self love.
I found this quote about self love at https://www.betterhelp.com/advice/love/how-to-love-who-you-are/
Self-love may feel like the love you'd have for someone important but directed inward. Self-love can be about accepting who you are and acting with kindness, gentleness, and patience toward yourself.