Confidence is finding the "they" that will like you. Not all people are the same. But we are social beings. So if you have a product, you have to find one who needs it. Or maybe even build the product that people need. But the best product that many people need always faces people who do not like it or even hate it. Confidence is not not caring about others' opinions. It's not being hypersensitive about every last one person's comment on the earth.