It's a bit like California v.s. Alabama situation. Also, not limited to Poland and Hungary, it pans along the West v.s. East, so it's like North vs South in the US.

For example, EU says you have right to bring your partner to EU. Then Denmark says that you can register a long term relationship and have the full rights without a formal marriage, Poland will say that you need to marry.

It also goes beyond the social issues as the strong leaders tend to mangle with the judiciary system to make their ways and EU is really not happy about it. When that happens, the countries get fined and their leaders will bash EU in a similar way like some American politician bash the federal government.

On a side note I am not sure if that username complies with HN TOS.