I don't think that mattered much for the election
It was at least 90% because of the EU fucking with the Dutch consistently for decades, decades of mass immigration that none of the people wanted. And all this was made more important for voters because of the left wing extremists literally demanding land seizures of farmers, trying to ban very popular things and trying to force changes on our national traditions. And all this was justified as being both "For the environment!" and because "You have to do it, we made an EU treaty that says you have to do it and that supercedes national sovereignty!". They've seriously pissed off everyone and as a result people voted for the most well known anti-EU party.
This whole "EU treaty goes above your democracy and you're just our subject, now sit down and shut up. We want to seize all the land!" is why the whole farmer protests started even.
The constant attempts to justify these (and many other) things by going "You don't get to vote on that, stupid peasant. Us politicians made a treaty amongst eachother and treaties go above laws", including using the courts to try to enforce these treaties as if they were laws is why Wilders got elected this time. And I can't blame his voters for it either. If anything I am surprised it didn't go further, and that he isn't more extreme.
Late edit- Maybe more like 50% that, and 50% because the PVV actually talks left wing stuff on economy. And the Dutch are actually interested in all that left wing economic stuff- Unions, good worker protection laws, min wage laws, subsidies for industries important to maintain the country, welfare and social safety nets for the poor. All that stuff. But all the left wing parties we have seem to be more preoccupied with selling out to the EU, environmental legislation commonly known as 'burgertje pesten' (Or translated, 'Bullying citizens', policies that do not help the environment and just ban or restrict things for common people) and identity politics. So that's a huge amount of voters that are trying to find someone to vote on. And despite the PVV having a track record of being close to the neoliberals when it comes to policy, they talk about doing left-wing stuff on economy. Even if it is highly doubtful that they'll actually do any of it, that gets them a lot of votes.
The people mainly want a combination of nationalism and left-wing economic ideas. And not a single political party so far delivers that. But the PVV said they'll try, so they get votes
