He also predicted about 10,000 deaths in total in his mid-March article -- and he even meant that number without any special measures like social distancing and WFH.
No, Imperial gave an estimation of what would happen without measures, but there were measures taken. So in their case, it's natural that the actual number (with measures) would be much less.
Ioannidis' already 4x surpassed prediction was 10K deaths without measures.
Given that we have 4x WITH measures, this means we would be many times more wrong if we followed his advice and didn't take any...