You should go and read some history books, assuming you're able to read and comprehend them.

The DDR aka East Germany ended in the 90s, and the Franco regime in Spain ended 1975 with Francos death.

It is debatable if one should also count the Yugoslavian/Serbian government which existed until the mid-90s as oppressive - I certainly do, Miloševic rot in pieces.

Oh, I almost forgot the rest of the Soviet block... so you basically have oppressive regimes as low as 20-30 years ago, leaving a LOT of people with first hand experience.