May I know why exactly these two countries should not be allowed to join EU? Because they cause issues? I mean, every country causes some issues. In the current context Germany and its former government lobbying for Russian gas causes issues of perhaps much larger scale. Tell me about corruption.
Both Hungary and Poland have been consistently undermining the rule of law for years. Hungary has also started going after freedom of expression and minority rights and let’s not talk about the anti-gay laws for which the European Commission is suing them. The only reason they haven’t been stripped of their voting rights in the EU (the harshest sanction available) is that the unanimity of the other members is required and they shield each other. It’s a disgrace.
The current ruling party's conservative coalition from 2005 collapsed under its own weight in two years.
You're judging the whole situation through the lens of the actions of a single political party, which came into power only because as liberal as liberals might be, they were sort of okay with having a sizeable disenfranchised minority in the country.
Joining the EU shouldn't only be about getting free money to rebuild your decrepit infrastructure and fund your local mafias. Lots of countries were accepted for purely strategic reason (ie. we prefer them with US than with Russia or China)