This is not all correct - care homes absolutely do exist here but they are expensive and oversubscribed just as they are in the UK. We also have assisted living facilities. There is some social care for older people but few British people of that age are in a position to navigate the system well enough to benefit. It is also not necessarily as cold in winter as the UK is unless you're in the very northern, mountainous areas and these don't tend to attract so many British retirees. On the Costa Blanca it rarely ever goes below 0 degrees for example. However the problem is that the housing is generally not built for winter, much is built for northern Europeans on summer holidays, so what you get is very little or no insulation, flimsy windows and doors without double glazing and no central heating. It's expensive using electricity to heat and largely pointless because so much of the heat you are creating just leaks out through the building structure and windows.
There's very little point in suggesting a British person of retirement age learn Spanish. Unless they have significant experience in learning and using foreign languages (I don't mean an O level in French 50 years ago) they simply won't be able to do it to any meaningful degree. The older the brain, the harder it is to retain the information and harder still for lifetime monolingual Brits compared to Belgian or Scandinavians, for example, who are usually used to speaking other languages. Those with a very open mind will do better but the rest should not begrudge paying an interpreter. It's the courteous thing to do.
I work for a charity designed to help Brits in Spain with whatever issues they have. I am a medical interpreter specifically so I attend appointments to interpret for my clients and often then have to be part of the aftermath of that which can include applying for social care, care homes and even the practical side of moving back to the UK.
What strikes us all in our charity is how little forethought some people seem to put into retiring out here. In their 60s or 70s people will buy three storey houses on hills, full of steps, and out of the way of any facilities or public transport so they need to drive everywhere - my own parents did the same and scoffed when I suggested that may not be the most practical situation for them. Unsurprisingly as old age has affected them I've had to move them in with me as their own property was unsuitable and I was struggling to keep up with their needs.
As falls, strokes, cataracts etc. become a problem these British retirees are invariably astonished that their lives become difficult to manage in their particular circumstances but refuse to help themselves in any way by even considering moving to somewhere more suitable. They expect family in the UK to drop everything to fly over and look after them every time the latest emergency crops up - then moan that their children are selfish and uncaring for not being there more. Meanwhile these parents refuse to accept visits from a carer or other kind of assistance in the home that could take some of the pressure off. This often means maybe four times a year or more that an adult child needs to arrange emergency time off work, find care for their children or pets, leave their lives behind and manage the expense of an emergency trip to Spain of an undetermined length of time. I rarely see any gratitude on the part of the parents - the ones who chose to move so far away without considering the practicalities.
Our charity has run a campaign for the last few years encouraging and offering practical help for these people to futureproof their lives a bit. It's unbelievable how many chuckle and tell you they don't need it.
Sorry, I know this is too long and could probably be a whole thread of its own but the point is, @Harbans, you have a lot to think about as well as legal requirements for residency if you decide to move to Spain. While many out here manage to live very comfortable, happy lives in their last years, you need to do your research and think carefully about how you would make it work in your circumstances. To do it well you will need a very healthy income. If it's all down to getting away from your kids you should probably work on that first and then if you still want to go, spend the money with relocation experts to improve your chances of a successful outcome here.