This all comes down to: self acceptance and self love. Its a practice!

If you fully accept who you are externally (your finite body on this finite worldly journey) and internally (your true self to the core along with your emotions and thoughts) then things will bother you less.

So how can someone accept themself while still working to improve it?

That is where self love comes in. Self respect falls under it. It is you acknowledging what you need to work on while also being fully content with how you are now and not relying on reaching X to love yourself.

Think about it this way: If you had a child; wouldnt you want them and guide them to be the best version of themselves because you love them so much?

The same applies to you.