people, not familiar with correct editing technique, or not giving a care
Don't let this get you down, everyone deals with this from what I can see. I've been working on some stuff in my area of travels and I can't believe some of the recent (< 6 months) work that's been done by higher level editors. They either didn't care or were dumb as dumb can be because halfway reading the editing guides teaches you not to do most of the things I've seen.
Bing maps has an astoundingly poor quality outside major metopolitain areas, and that is usually out of date by 5 years or more
It's not just Bing using outdated images. I was browsing Google maps for some verification and noted a lot of their images are copyright 2007 and 2008. I'm not sure where the satellite photos originate from but it's been a long time since a scan has been done in central Florida and Alabama.
because it uses too much data
I agree there are a few performance issues that could use attention, my 3GS struggles sometimes. Without seeing the app code and the actual data coming across the link, it's pure speculation to say what's causing it. I will leave that up to the guys that wrote the app. I do know that I can't use turn by turn navigation because my GPS is never available once the nav starts. I see that red message constantly when doing turn by turn but GPS Info, Google Maps, and MapQuest don't seem to have a problem when my Waze isn't working. I am putting together as much info as I can before submitting something to support.
Just hang in there, nothing worth while is built overnight. You also have to remember that some of these issues (like the volunteers) are simply part of the deal. I just look at it like the more they screw up, the closer I get to the next edit level.