How Can Humans be So Hypocritical?

So many people say they'll do one thing and then do the complete oppisite. This goes for me too, especially as a christian, i feel like so many times people tend to be very hypocritical. Its like a self-fufilling prophecy You judge others on what they do and in return people judge you. When in reality who has the right to Judge anyone besides God? No one. How is anyone supposed to ever grow in life if they are constantly judging others. I know this is one factor in everyones life but i hope its something that people will want to recognize and change. The main reason this topic is on my mind is due to an event that took place when i got home tonight. Which acctually doesnt have to do with judging but more so me personally being a hypocrite. I'll admit it, how am i ever supposed to learn about my mistakes if i dont own up to them? Well when i got home tonight and started talking with my mom, i told her i got Windows7 for my computer, but it wouldn't let me download it. If anyone knows my computer then they know that it is a DEFECT it is only a year old and runs like its a computer from the early 90's. SO. . .hoping Windows7 would work on my computer i bought it, without realizing later that my Computer doesnt have enough memory(RAM) to even upgrade to the Windows7. Very frustrating. I told my mom & she disagrees with me, saying she knows my computer has more memory then that. I clearly just tried to download Windows7 and it wouldnt work AT ALL. Ofcourse i had a very short temper tonight. .so much has been on my mind lately and one thing led to another. Now i am the only one up and my mom is mad at me because we got into an Argument. Ughh the worst way to have a night, if you know me then you would know i hate going to bed with things "unresolved". So to get back to my point i feel like i displayed a perfect example of being a hypocrite tonight; sadly but true. I have been trying to grow closer with God and i have been wanting to improve every aspect of my life & then i came home and acted out of anger. I obviously still have alot to learn and tonight i hope i can remeber in the future that its best to not say anything sometimes. . . .even if your extremely opinionated like me! :)