I don't so much miss the US, I really miss having a job and being more self-sufficient. My work outside the UK has no value and these past 6 months of constant rejection is really getting to me. I am now registered with a load of recruiters and they said to lower expectations even more and start from the very bottom (£10-12/hour admin roles) so that I can build credibility within a British higher education workplace. I will do it of course, but it is definitely a professional nosedive and financial shock from £35/hourly that I made as a lecturer the US.
It is hard. In the States I was bringing in a similar amount as a personnel administrator at a University, with 20 years' experience. Here I'm having to fight tooth-and-nail to get interviews for entry-level, clerical positions in academia at £8 an hour. I've had more luck with interviews for government jobs, but they also pay abysmally poorly for the duties of the positions. It's just an entirely different landscape here that you have to navigate.
I've been looking for work, on and off, for over 15 months now. I had a job offer that ended up being pulled because the Home Office decided they didn't want to have to do a security check outside the country on me (I hadn't been in-country long enough). I have had another offer where the final terms of the offer were not what the advertised position was as far as hours worked for the stated pay - by a longshot - that I turned down. I do think it's just a matter of slogging through it until you can get something, anything, that is tolerable - for the maintainence of your sanity. From there, you start to build a career all over again.
For me, it's realistically too late to do that - I'm really already early-retired, but have a few good years left where I could be productive. Unfortunately, I'm bidding for the same jobs that someone 21 years old and completely "green" is going after, and I really do think there is both an anti-age bias and the consideration that I'm not as good an investment as someone who they could possibly keep on for a few decades. Them's the breaks. Please don't give up. Even if you take something well below your capabilities and experience, it'll be good for your mind to be working. And you don't have to stay there forever.