Remember that "winning" an election in a European system by being the largest single party doesn't mean that the party will form the next government. Austria has a highly proportional system. 34% got Labour a thumping majority in the UK, but with 28.8% FPÖ isn't even guaranteed a place in the government.
Look at the Netherlands, where the only slightly less far-right (and arguably more bonkers) PVV got 35% of the vote. Their leader, Geert Wilders, is such an arsehole at a personal level that nobody would go into a government with him in it. As a result the current Dutch government is mostly run by responsible adults, enacting one or two socially-conservative-ish policies, but is still very pro-Ukraine (which Wilders isn't). Basically he is the dog that caught the car.
Or Italy, where practically the first thing the "anti-immigration" Meloni did was to increase the number of visas for foreigners, because Italy needs people. (I note also that Suella Braverman's "anti-immigration" Home Office issued over a million visas in FY 2022-2023.) She still has a pop at the evil gays from time to time, but she is no fan of Putin and overall the western alliance is no weaker for her premiership.
Hungary is a more difficult case because Orbán managed to get a majority once and is now using every electoral trick in the book to maintain his power. The EU is doing its best to rein him in by using financial coercion.
Of course the far-right are very worrying, and I wish people wouldn't vote for them, but we have to accept that they do, and perhaps try to understand why. When 5% of people vote for them we can maybe dismiss them as Alf Garnett-type racist cranks, but when it's 30% that's a lot harder. It's a bit like the old joke about how if you owe the bank a million pounds you have a problem, but if you owe the bank a billion pounds then the bank has a problem.