I've seen a few comments from 'initially he was a very good leader' followed by some criticism. I didnt know the answer so google wiki and while a lite verison of events it might help people understand things better:
Largely to me it seems he started with genuinely 'good intentions' that didn't work out, vs being a 'good leader'. Good to me includes both vision and execution.
It's probably wrong to reduce a person's success to one measure. He obviously had his failures, but his contributions to Zimbabwe's healthcare and education systems are what I remember and is why I called him a good leader early on.
Even today, here in neighbouring South Africa, there is a big gap in the average literacy rate of Zimbabwean and a South African.
Mugabe totally stuffed up the country later. But credit where credit is due.