First off, I'm sorry you're having such a hard time with this.....
But, let's not make it out to be the sword in the stone that only a select few can remove. I did mine on my last car solo, when I was just learning to work on cars. Sure it was a real bitch, I'm not gonna say it wasn't, but it wasn't impossible either.
In a span of a couple days (not putting in full days by any stretch of the imagination) I had the up-pipe, down-pipe, cat-back and a small handful of other things done.
All of this with hand tools, no previous experience, on a 6 year old car (rust, salt, corrosion, etc fully in effect).
I'm not knocking you for your experience with it....there are always possible problems to run into (who hasn't had one single bolt hold them up for an hour or more?), but your description is gonna scare people away from a job that is nothing less than a bitch, but far from impossible.
Getting help is great if you can....but if you can't don't lose faith

Get a good breaker bar, a long cheater bar,
2 cans of PB blaster and spray things down a couple times at least a day in advance, then jack up the car, remove heat shields, spray everything again liberally and take a good half hour while it soaks to eat or drink or organize tools/parts or whatever. Oh, also make sure you have a decent set of sockets, some of these bolts will break cheap ones

Those spring bolts on the dp to midpipe do suck balls. I used a open ended wrench wedged in to hold the head of the bolt still, then on the nut put a socket on a 24" breaker bar, with a 5' length of pipe over that. Leverage is your best friend in that situation
