Complex sentence: During his last years Paavolainen often complained that he felt exhausted and drank heavily, and occasionally didn't bother to go to work, and nostalgically planned to write the history of Tulenkantajat.
Split into simpler sentences: During his last years Paavolainen often complained that he felt exhausted and drank heavily. He occasionally didn't bother to go to work, and nostalgically planned to write the history of Tulenkantajat.