When life is brutal and your friends and coworkers all don't wanna hear it, it's sometimes the best moment in your life when you realise that you don't need to care about them or have mercy on them playing your way up the work foodchain. After realising that, the hole in your heart and need for affection can be mended by increasing alliances with those close to you such as your mother or whoever else. If you really have noone then sure, hate Christmas and fuck it, hate life a little too.
I think the biggest thing people do wrong when life is actually cruel to them, is to take the Buddhist approach of going 'peace to all, I am not really angry or sad'. Fuck that, take the Pagan approach of appreciating that life IS shit and you SHOULD hate and distrust some people. Make sure you learn who you can trust, who really is there for you and love every bit of them but it's just as important to embrace your negative feelings. I want you to seriously write out why you're sad, angry and jealous. Then write out ways to get out of feeling/thinking that way or at least ways of coping with the feelings.
As I say, worry MUCH MORE in life about keeping good relations with those who have good relations with you. Worry MUCH LESS about improving relations with those who are cold or cruel to you. That's it man, that's the solution to finding joy in life in my eyes.