Assalamualaikum and Salam 1 Malaysia
Don't ever say you're not good enough. If that person can't see how amazing you are, then they are the one who's not good enough for you.
Let say if I tell myself. I'm not good enough so means that I'm trying to be humble you know.. Can you get it? And if the rest of my friend say "You Are Really Not Good" so I should say thanks to them course they able to see my weaknesses and I'll try to be good person day to day