He couldn't have summed it up any better because he didn't.
Turns out this quote that's been flying all over the internet is just a joke.
The team were shit but they had the best fans in the world...ever.
It's very believable though given he says the work fuck 18 times in the book at that the observation would seem to be a very valid one. For example:
That’s right: for fuck’s sake. Double fuck. The first words that come to my lips when I think of Istanbul. For me, it’s now the capital of evil and forced cursing. Swearing’s my release, and the one weapon I have to defend myself against destiny when it elects to strike without pity. I’m not superstitious, so I’ve got to have something to cling to.
And here's the only reference to Ireland in the book:
Another time we gave him a soaking with a fire extinguisher. A draw away to the Republic of Ireland had been enough to secure our qualification for the 2010 World Cup in South Africa and so the last group game, against Cyprus in Parma four days later, had become almost like a friendly. Pretty much meaningless, and that’s exactly how we treated it.
For some equally great and very real quotes read: Yet More Absolutely Brilliant Quotes From Andrea Pirlo’s Autobiography