I do not envy Astros fans right now. We know their pain too well. It's unbelievable how much better it is not having to watch this type of a team everyday anymore.
I know what you are saying, but I somewhat disagree.
My biggest pain during our years of losing, is that we did it incorrectly. We seemingly had a goal of 70 wins and being respectable, which I think delayed our ability to bottom-out completely and get back to competitive ball quicker. Houston is going through some horrible baseball (after a decade plus quality run), and they will continue to be horrible for awhile... but they've brought in some interesting baseball minds, and I think are doing things correctly.
The next 2 years will likely go very slow for their fans... but by 2016, they could be the verge of another run of long, sustained success.