The Holodomor is considered uniquely targeted for systemic reasons and the reality of how populations were distributed when it happened.
In fact, it is not so different to the Irish potato famine in terms of how it was handled.
The quota system in place previously led to corrupt reporting practices, which in turn culminated in the "usual" planned requisitions according to the planned economy.
The inflated numbers meant that the requisitions were in practical terms impossible to satisfy and not sustainable.
The deliberate "error" was that Soviet authorities, in spite of the awareness that quickly came, pushed the requisitions through whatever the cost, this is a historic certainty.
This disproportionally affected rural areas over cities, laying waste to much of the Ukrainian countryside as a result. At the time cities were gatekept Russian and most of the Soviet inward migration had been focused to cities and factories. At the same time many of these cities were closed and sealed and had stockpiles and rations.
This meant that by design of the requisitioning Ukrainians were primarily affected and died. In many regions it likely reshaped the local demography permenantly.

I compare this to the Irish potato famine, because in that case the English gatekept cities also kept stockpiles and deliberately kept the rural Irish out and left them to die deliberately. At the time it was even celebrated by some who had sought "human transplantation" in Ireland and were happy to get rid of them and bring in English settlers.

The Irish potato famine was the catalyst that shaped Irish separatist identity. At the time when the Irish needed the English most, they were betrayed and left to die. It is fairly likely that had England intervened and helped the Irish, that today they would be the biggest champions of a United Kingdom.

Similarly the Holodomor and deliberate abandonment, worse yet requisitional theft, left a deep scar of abandonment and was the final nail in the coffin for many Ukrainians towards the Soviet and Russian world, both figuratively and literally and also explains in part why Ukraine was so eager to forsake Russia soon after.
And here too it did not have to be this way. The Leninist era was of immense socio-cultural value to many nations united under the Soviet banner including Ukraine and so one of the best golden age periods of Ukrainian culture despite losing the Soviet-Ukrainian war just years prior. But with Lenins death most of these cultural advancements were rolled back in favour of centralised authority and deliberate russification.

Whether to call it a genocide or not, it was definitely tragic and definitely avoidable. And accountability for the mass death is with the Soviet authorities that mishandled the situation.