In my limited experience with other hosts (i.e. I've only looked into what they offer, not actually paid for their services), the hosts that offer the (expensive to the company) live person support will generally have much more restrictive resource limits and stiffer penalties for violating those limits. So, you get what you pay for. The main reason why I stick with DH is that it seems they are focused on being as generous as possible with their resources. That's great for someone who knows, or is willing to learn, how to do what they want to do, but the flip side is that clients who need more hand holding will feel ignored.
I agree, that is pretty lousy. And while I do agree with Ryo-ohki that you should have your own backups (even in your backups user account), DH should do a better job of either making sure their services actually work as advertised or stop advertising them. The backups service isn't the only one which DH knows doesn't work as advertised, yet they continue to promote it. It's a very poor way to present yourself and just creating dissatisfaction for clients.
I wouldn't mind looking at the wiki more often if DH actually made an attempt to improve it! A lot of it is customer generated. Compared with other hosts, with the note above that they probably have stricter resource limits, the knowledge base at DH is a bit mediocre for a company that expects its clients to help themselves.
When you find a better host, come back and let me know what it is so that I can add it to my comparison database. I'll be interested to know what their resource limits are.