After a decade at the same employer, I was completely burned out -- I had worked 60+ hour weeks for many years, with nothing resembling a "real" vacation since ~2004. I didn't enjoy the bulk of the work. I wasn't learning anything applicable outside of my employer's niche. I was being given projects that I was completely unqualified to work on (but I was the least unqualified person, so they fell to me). After one pa…
It may be the combination of 10+ years at one company, plus a gap. It could be something else. Have you asked those friends for an update what happened after you sent your CV?
In my (limited) experience, even though people say there's a shortage of qualified software engineers and it's a great market for them now, it's always hard to find a good job. Key word being "good". Unless you're a "rock star" that has written a book and is being hired to speak at tech conferences. Companies are still being picky, even if they can't afford to be.