Hi Jack,
Getting rid of the computer or managing your time better will not help you at all. Your essential problem is that you don't feel adequate to fulfill whatever expectations and desires that you have for yourself or that other people or society imposes upon you. Everyday you wake up and you feel that you have an impossible job to do and our brains and our psyche cannot handle impossibility well at all. Instead it looks for things that we can do a) to show that we are adequate at something b) to distract us from the pain that we would otherwise feel.
You feel deep conflict because you live under a burden of impossibility. That's something that drives everyone crazy. We get confused because, in theory, what is expected of us or desired should be possible but in the moment that we are supposed to deliver it we find that we can't and that makes us feel lousy and inadequate.
If you don't work on the fundamental issue of getting realistic about what you desire and expect of yourself and if you don't focus on getting past the little issues that hold you up each day then you will never make any permanent progress. You might have the occasional good day but the fundamental problem will still remain. Take away the computer and you'll start watching TV. Take away the TV and you'll start reading incessantly or some other easy to do distraction (I know because that is how I behaved for years and years).
This link will take you on a journey that explains what ails you and what you can do about it
Fundamental Insights
Nick