It's actually easier to focus more on the negatives instead of the positives inside ourselves, because for the positives, we might think that they're not good enough. Say you're a great writer. However, you can't praise yourself for that (at least not as much) because you know there are others far greater than you ever will, and so you're not 'good enough', or you fail. Eventually this doubt shrouds the rest of your good traits, as you are too engrossed in trying to compensate/improve the said doubt.

I believe everyone is a victim of self-hatred, in one form or another. Sometimes we don't even know we're victims because self-hatred can be implemented in a myriad of ways. Glorifying others for their accomplishments to mask our inner insecurities is just one of them. Though I think this concerns desire and jealousy more than anything. We praise them because we envy them; we want what they have, but because we cannot say it outright, we do the "right" thing by congratulating them instead, as it's common courtesy to do so. But if you want self-hatred, then in this situation we hate ourselves for not being able to accomplish what they have accomplished, thus magnifying a negative: failure/weakness.

But as humans, I think it's natural that we have weaknesses and insecurities, but the point of the matter is that they shouldn't control us, or overwhelm us.

I'm sorry, but I just realized. Concerning my second paragraph: there *are* those who genuinely and sincerely congratulate without being envious, they're just few in numbers. I admire them though.