Orban, being the contrarian that he is, finds friends in those that seek to undermine european and western unity. Russia, China and Trump fall into that category. Ukraine is forced to host Orban, because he is the biggest roadblock amongst Ukrainian allies for more aid. And Hungary has taken over the presidency of the council of the European Union, which rotates every six months.

As for why Orban is president of Hungary: Corruption and propaganda. Orban controls the big media institutions and has all other press harassed. He has control over the judiciary and a wide net of sympathisers both within and without the government. He is as close to being a dictator as the EU will let him and he keeps testing the waters to strengthen his control further.

A large hungarian voter base is as loyal to him as MAGAites are to Trump.

In short:

• In the beginning he won an election with supermajority, since than they changed election rules so it’s harder to get them removed (rules favor the single strongest party, so they can be beaten in 1v1 only, but the opposition has several parties)
• Many young people who had enough left the country, but it got harder to vote if you emigrated
• They introduced a public work program that local mayors use to threat people to vote for them
• Orbán realized that leaders in the EU stopped believing him, so he made new friends with Russia, Kazakhstan, etc
• He uses the only power he has - he can pose as the leader of an EU county legitimizing these autocracies, and
• vetoing EU decisions un favor of his New friends
• EU was created with a good faith, a county cannot be kicked out
• So the only lever they have is closing the money tap that would dry up his guild of thieves - that is happening right now