Yep, worker's rights, universal health care, women's rights (voting, divorce, abortion, generous maternity leave). Compared to Switzerland which allowed women voting rights in the seventies, communism was putting uncomfortable comparisons at some moments. If you wonder why communism was attractive, it wasn't just because of propaganda or because people were stupid, but because communism was addressing actual problems of the time that the christian conservative establishment of the west was preferring not to handle.

The fact that you put the tatars as the only thing to know about communism shows that you've learned one thing and found it sufficient. At the same time, the link you share shows how later communist leaders acknowledged Stalin's actions as a crime... I'm not here to defend communism though (mainly because it is not defendable), just to provide a perspective beyond the standard tropes.