I believe Apple stopped signing on the iOS7 because of the interactivity that's fresh for iOS8, involving the Cloud and storage - particularly iCloud Drive and iCloud photos - that are supported in Yosemite. Once you go, there's no way back. So, for people that would be taking advantage of those services - handoff, drive, photos, having all your info everywhere, notifications between devices, etc that iOS8 either ushered in or refined, there'd be great loss of data and very angry people that their photos, notes, memories, emails (possibly) and other things would disappear forever. The only reason to update to iOS8 to begin with was the addition of all this ability to interact. The Apple Watch is on its way, as well, and there will be no provisions in iOS7 for that.
I BELIEVE, that's why they don't let people go back. Again, that's my educated guess.
As far as Apple deleting posts, they don't troll for rants. They do it when someone reports your post. So, it's a strong bet that someone took issue with something you posted.
As far as the issues, some who have persevered have overcome them. I have by, the methods outlined in my posts in this very thread, have overcome all the issues on a pair of first gen iPad Minis, which are pretty much iPad 2s in smaller form. It can be done at the Pad level. I STILL believe there's a WiFi issue with specific carriers, though, and THAT's traceable and should be reported through the link that Peter and numerous others have provided.
And regardless of any technical issues, I'd rather be hanging out with my kids than playing with an iPad, iPhone, or Mac any day of the week.
Bob