People are not being ageist. They are objecting to the greediest generation ever that pulled the bridge up behind them.
On average a boomer will receive £400k more from the state than they paid in.
Millenials will pay in £300k more than they receive back.
The social contract has been broken, and entitled older people seem to think it is their right to impoverish the younger generation like this because "I paid some tax". Even if it was nowhere near enough tax to cover your own costs. And then accuse the people funding their largesse of being entitled. That is why there is anger.
The demographic problem was long foreseen. Did this cohort do anything to pressure the Government to implement policies to mitigate the demographic timebomb in healthcare and pensions? No. They took the lower taxes, fuck the future, fuck the climate, fuck the national infrastructure we sold off/ didn't maintain, fuck what we did to education, no energy security, no food security, water system fucked and not upgraded since the war, and now we'll just demand our pensions and you should suck it up. Oh, and a large proportion of them voting for Brexit and screwing over young people now and for generations to come.
That is why people are pissed off. And the fact that apparently many of you seem oblivious to the fact that voting for all of that ^^ repeatedly - knowing it would totally screw future generations - is very telling. Yes, there are exceptions. But as a generation, it is the most selfish and also self-righteous. And always the belittling of others because they can't do what was easy for you in an entirely different economic climate, also goes down like a lead balloon.