Idealist
Please try not to feel guilty about life. He completely understands now. Besides, I think you gave him a great gift. You gave him the opportunity to vent his frustration. You gave him your shoulder and your ear. You gave him something to look forward too - even if life had different plans for the two of you.
It's not your fault you didn't get the chance to see him before he died, and it's not his fault for dying before you had the chance to see him.
Rest in peace ((Uncle Kenneth)