True, every day can't be a good day, but my 24th birthday was just overwhelmingly "hello, welcome to being a real adult". Sometimes, everything that can mess up will. And a lot of days are going to be really bad days but you have to find a way to get through them.
This is life. Get used to it. You're not a child anymore. You can't just cry and hope for something to make it better.
No one will do things for you. You just have to take control of your life and do things for yourself. Go out and get what you want and screw what people think, because you have the right to do what will make you happy if no one else does.
In the end you're on your own and the only person you're allowed to expect anything from is yourself.
I realized the only way to do this is to just remind yourself of what you can do, what you have achieved and why you're great. Because every day, you're going to be reminded more than you need about what you're bad at.
If all else fails just go to bed and sleep it off and hope tomorrow is a better day.