It is not wrong to grow old, nor is it wrong to expect a dotage of decency and compassion. In fact in many cultures the old are venerated and accepted as fonts of wisdom and knowledge who are greatly respected within their familial and social groups.
It is also a fact that the UK population model differs from the Malthusian concept of population resembling a triangle, with the old at the top and the young at the bottom. There were less older people than younger people. Nowadays the model resembles a lightbulb, People are living longer due to medical advances and the UK birthrate is falling to such an extent it is almost moribund.
As the aging population increases it takes more resources, as in Pensions, healthcare and other associated welfare items such as free travel passes. This leaves less for the younger members of society who now have to pay through the nose to go to university, they see their healthcare as rationed due to the perception that hospitals are full of older people and GP surgeries have fewer appointments, again it is easy to see why this is attributed to older peoples healthcare needs, although there is a segment of society who persist on blaming these problems on immigrants. That is an easy get out clause for the hard of thinking.
There is also the question of the younger segment of society seeing the older members as asset rich, although asset rich is often in hand with being cash poor. But for a young person struggling to find a home for his/her family seeing an older person living alone in a three bedroom house whilst there family lives in a one bedroom flat is bound to cause some resentment. That is because the postWW2 consensus led to the belief that every generation would be better off than the preceding generation. Once that consensus was destroyed and individualism was promoted over social cohesion we entered a new world. That world sees a non productive member of society as a burden on society rather than an asset, because they are taking up resources that the individual came to believe should be allocated to them.
Reading your post, I see and acknowledge you have done what most would consider to be the right thing by yourself and by your family and quite rightly expect your contribution to society to be seen as worthy and respected.
As for patronising behaviour against you, I have been involved in some work recently looking into digital exclusion and how it is now assumed that everyone has a level of technical capability they can use items such as laptops and smart phones. This is a major issue for many of the aged in society, it is for me and I am only 56. We have found many young people who have grown up being technically able, fail to grasp a world where this technology did not exist and failure to be able to use these new technological advances leads to feelings of alienation and bewilderment. Some of these advances are what could be described as simple such as self check out tills at supermarkets. Which I never use as I don't like them, but go in a supermarket and in general you will see older people queue at a person operated till, whilst the younger generation fly through the self operated check outs. This creates barriers between generations.
Are there solutions, yes of course there are, but that would entail a restructuring of society and a Government willing and able to address the issues, sadly that does not appear to be happening anytime soon and in the meanwhile EB whilst you do grow ever older my advice would be to do it disgracefully happy in the knowledge that you have played your part and that your family and friends respect, admire and love you.