Conservative 'victories' are always nothing more than delaying progressive changes for a few years, then eventually adopting them.
I don't think that's a fair way to look at it. It implies that reform is something that only happens because the Right is too spineless to oppose it, rather than an attempt to keep the boat afloat in the stormy seas of modern era technological and social change.
It shouldn't be forgot that Conservatism was born during the age of the French Revolution, in a time where the only existing choices were either unhinged Radicalism or stubborn Traditionalism, either option likely to lead to civil war and the complete destabilization of society. Conservatism grew out of the complete inability of Ancien Regime governments to deal with public discontent in any other way than repression. To make changes when absolutely necessary, to prevent society from spiralling out of control and losing everything. This has been a very real possibility for the last two hundred years in every Western country.
There have been groups advocating for full blown Communism since the 1600s. French Revolutionaries were already planning to abolish religion and private property in the 1790s. There were numerous radical uprisings throughout the 19th century, Marx' prediction of a mass revolution was hardly unfounded. The main thing preventing these movements from gaining power indefinitely and were forces that were flexible enough to marry pragmatic reforms that adressed society's practical needs without the need to destroy European civilization and start anew. Whether it's a figure like Napoleon, or the democratic process, or Third Way fascistic models in the Interbellum. All of them helped to take the wind out of the sails of the most unhinged radicals, because they would've had free reign to monopolize the populace's irritation. It's no coincidence that the only successful Communist takeovers occurred in political systems which were too self-entrenched to ever consider reform until it was far too late, giving the average disaffected person no option to conclude, "Fuck it, maybe this firebrand preacher is right that we should just burn everything down."
The problem in the last half century or so is that we're seeing concessions that aren't necessary, and I think blaming Conservatives for not appealing to the population is only part of the problem, and it's a 'chicken or egg' issue as well. Society
is changing far more rapidly than it ever has before. Globalism is rampant, demographic shifts are reachimg alarming speeds amd the Internet and social media have become so omnipresent and essential that we still can't fully appreciate how much it's warped our psychology, both personal and collective. You can't even speak of a 'generation gap' anymore, someone born in 1990 has a completely different upbring to someone born in 1995, or 2000. Not to mention the degree to which your own involvement with the digital sphere forms your social psyche.
I think change has finally outpaced the Conservatives' ability to rein it back in after two centuries of success. People are radicalizing at an insane rate right now, to the point where any discourse or accomodation is fruitless, as they've reached the point where they hate reality itself. Which has only served to make the very idea of compromise completely unacceptable to many on the Right.
I'm honestly reaching the point where I don't see any real outcome which doesn't devolve into endless anarchy and bloodshed, regardless if it's by the Right or Left's hand, the exact thing people like Edmund Burke had endeavored to avoid those two hundred years ago.