I would call kicking out corrupt occupier oppressing workers and pretending to be socialist superpower as a great success.

Doing it with no bloodshed typically accompanying such events was even better.

Russia was not friend to workers, it was oppressive evil state and kicking it out (what started steps toward collapse of USSR) was one of greatest successes in the history of Poland.

It was no accident that largest strikes in the history of country taken place during PRL and capitalism is so well regarded in Poland.