The current deficit is an issue, but nobody should take what GERS says as gospel. This was a mistake made by the SNP at the last referendum. One I hope they won't make again. IMO you can't effectively measure the extent to which England economically supports Scotland (or vice versa) when there are not separate English and Scottish economies.
As for oil revenues, it's amusing how you concentrate on a single bad year. Check out the peaks and troughs of the last 30 years. Alistair Darling himself stated back in 2008 that "Scotland's oil revenues have been underwriting the UK's failure to balance the books for decades".
One of my favourite quotes comes from Derek Bateman and truly sums up your position - "A country denied the ability to run its own economy is blamed for being bankrupt by the authority which exercises those macro-economic powers over it. The British Treasury pulls our wings off and then laughs when we can't fly".
As for posters playing the man, you have nobody to blame but yourself for that.