Yes, but many places in the EU use proportional representation or something close to it, so even if those parties gain significant traction, there is still protection as they are forced to work together with the rest of the parties.

In contrast, my own country Canada is far more at risk of the rise of an authoritarian adjacent party. A party with majority control has too much power here, and lack of proportional representation also means that majority control can be achieved with less than 50% of the voting population supporting you.

This is why I say the EU has better protections. The existence of parties that want more authoritarian control shouldn't be a measure of the health of a democratic system. In fact, somehow forcing these parties out would be pretty against the principles of democracy and free speech.

I do suppose its worth asking the question of whether democracy should allow the voting down of democracy itself, but I don't think the EU is at risk of that as a whole, even if a few member states are.