I could understand you if you wanted to return the "good old days" of the communist block under USSR (well most people remember only the later years which were relatively peaceful and without much repression, unlike the 50s), but Austria? The monarchy that in the end managed to be even more inept than the Russians and only matched by the Ottomans despite having a much better starting position? Some very rosy tinted glasses you wear

You can read what the Czechs think about anyone governing them from Adamgerd (and I do think he catches the public mood pretty well, but there IS a sizeable minority there which appreciates what EU does for them), and I can safely say a referendum about joining Austria-Hungary would fail spectacularly in Slovakia. The spectacular part would be mostly because of the Hungarian part (and I have a feeling all the slavic nations historically under the Hungarian part of the empire have similar feelings), but it would fail even with just Austria. Yes, there is also a lot of pub talk about badly governing ourselves etc. and it is mostly true, but a referendum is a different beast altogether. I think a referendum about remaining in the EU would probably fail at this time, but a referendum about leaving would definitely fail. We are just bad at referendums (there is a 50% quorum required), the two about joining EU and NATO were the only successfull ones in history
In the end, the EU is a much better alternative, and for you probably bonus points for it still being mostly led by the Germans