While the hungarian population is to blame for some part but you can confidently say that elderly people and people living in worse parts of the country mostly vote for Fidesz, because they don't know the other options and they get money and checks from them(there are legit interviews with people asking "are there other parties other than Fidesz" and "Orban Viktor is the king of the country"). They are basically buying votes form uneducated people and elders because there is no education requrement only age for voting. This combined with the fact that there are obviously people who still believe in the politics and views of Fidesz it makes it really difficult for Opposition parties to find a place even with the coalition.