I hate seeing posts of people belittling themselves and say that they're the reason they're lonely or depressed and that they don't deserve anything....etc .

No , you're not less of a human being than every other person , you're not less of value , you're not Garbage . You're a lovely human being who's just dealing with a lot and wants to be comforted and cared for and loved , a basic feeling that everyone should feel , unfortunately people around you may have not made you feel that way but never lose hope on finding the person who will make you feel appreciated , because when you lose hope , you lose everything .