Dirk, you did indeed point out that there area's that require improvement, however not everything is as quick a fix as you think, unless you know differently. If so, you might be the man to implement the fix.
The idea of member's adding information etc is an interesting one, and worthy of further exploration. You would have to be careful of getting like Wikipedia where information is uncontrolled, but with the right safeguards it could work. There are members who don't post photographs, but who might be able to add data, and this could be a way of involving them.
The person who sent you the abusive PM was right out of order. You have as much right to your opinions as anyone else, and, while you put them forcefully, you were not abusive. there was a case a while ago when an admin posted publicly on much the same lines, and I pointed out then it was out of order.
All I'm saying to you is don't expect too much too quickly, and certainly don't expect perfection, but still enjoy and contribute to the site.