I have met some ppl who thinks exactly like you and their problem was, they don't know and love them selves. They are always living in expectation. Always comparing them selves with ppl. Hating ppl for being better than them. They don't have self respect. They always want the best but not being able to 'have it all' makes them hate everyone else who they think is better than them. And from what i have learned from ppl this kinda feelings sometimes arise from personal or family issues around them. Being undermined by there family(some are being beaten and abused by their family members constantly..). Maybe some relationship issues, being cheated on or dumped and stuff, maybe being bullied by friends ans stuff also can make them hate ppl so much. Specially if those kind of things happens in their life too often, their possibility for a hate toward ppl is also getting high. Find your self. It may taks time i won't lie, but try to find someone(friend) who can always keep you in positive side no matter what. And still if you are not sure about anyone, then maybe you should see a therapist.