Land redistribution was one of the core issues that needed grappling in 1980, when Bob came to power. I believe white land ownership actually increased in the decade that followed, alongside an agricultural export boom.
Mugabe has used the land issue as a convenient whipping boy for many years; it helps distract from the wider ethnic violence and oppression carried out by ZANU-PF and the military North Korean trained hit squads. The "veterans" were a segment of Mugabe's core support (many of whom would have been in nappies at the time of the war against Ian Smith's racist regime) that simply occupied white-owned farms with government support.
He's the last of a breed, Mugabe. The last surviving liberation era African leader. And in his mind, he's still fighting the anti-colonial battles like in the old days, with Nyerere, Nkrumah, Kaunda, Karume and the rest in the 1960's. Admittedly, his battles lasted longer and generated much more bitterness. His rants at homosexual plots by gay British politicians give the game away. Everywhere, plots and calumnies generated by external threats.
Mugabe has presided over the destruction of the democratic and legal framework of Zimbabwe, extended a regime of terror and run the economy into the ground. His life experience was framed in an equally vital battle against a racist, provincial white Rhodesian regime that had weighed the institutions of state against the black majority. The hunted became the hunter.
I don't know how Zimbabwe moves on from this. The Ndebele/Shona divisions, the lack of political infrastructure, the poisonous past. Nyerere said to Mugabe in 1980, "You've inherited a jewel. Keep it that way". For a host of reasons this wasn't possible.
I suspect that whether he gives up the presidency or not, Mugabe's influence will only end when he dies.