RobDrobd:
Don't be too hard on yourself.
Malcolm Gladwell was right - it takes like 10,000 hours to become a true expert at anything. The fact that you can even DO any of this is an increasingly rare skill in our hands-off world. So feel good about that.
(this is the sort of thing I tell myself after royally screwing up some part or process, or stabbing myself with a screwdriver, or hammering my finger instead of the punch I shouldn't be holding because I should have gotten the punch-holding tool, etc).
:-)