It feels that way, because it kind of is winning a bunch of battles. Whether it's "winning the war" is much more up for interpretation - the past was seriously shit going just a few generations back, and it will take a lot of backwards progress until we get anywhere comparable.
Okay, so why is it happening? When it comes to democratic backsliding specifically, the first reflex everyone had was to blame social media bubbles for causing runaway political polarisation, but it turns out breaking those bubbles actually increases radicalisation, so that's not it. Another theory I've heard is that in a democracy, the weakening of a political party inevitably creates space for extremists to take control. There definitely was some building dissatisfaction with the status-quo right before the trouble began, I could feel it, and in the case of the US specifically winning a party is nearly as good as winning the country.
It's also worth considering this has happened before. Since the French revolution itself the path to liberalism has been two steps forward, one step back. I don't know what causes it exactly, but the dip we're in is big - comparable to the one before WWII.
Even evil people are winning. Why?
That's yet another separate question, which I struggle with too. One notable bad person isn't even smart-evil.
It's been shown in studies that narcissists achieve more conventional success and social status, despite the fact they pretty much ruin everything and everyone they touch. It's a real thing. Bad actors are given far more leeway than would be game-theoretically rational for us to give.