In soviet, lots of things happened. Firstly, famine was not uncommon in the first place. Countless deaths from famine was also the case before the October revolution. Just in the beginning of the1900's there were famines in 1901, 1906 and 1911, and not long before that, there was a famine in 1891 which claimed 500k lives.
The collectivisation of agriculture often gets the blame for excessive deaths during the 1932 famine. It would be better to say that the landowners(Kulaks) reaction to the collectivisation caused excessive deaths. Millions of cattle and pigs were slaughtered and left to rot by the kulaks and crops were burned.
In spite of these sabotages, there were still farms that successfully collectivised and managed to meet the quota set during the famine. Even though Ukraine SSR have had had the infamous rumor of genocide against Ukraine during the famine, it was also here the reaction against collectivisation was strongest, and sabotages to food production destroyed around 50% of crops and cattle.
The famine was actually worse in Kazakhstan in terms of percentage of population. And there was never a claim of genocide taking place in this region. Guess not being a neighbor to the west isolated you somewhat to western propaganda.
Long text, might contain errors, so feel free to point out anything you see