To be fair, I think that criticism is justified when their activities on 2020 are looked at. That year they announced:
March 2020: they will “collectively make a change in the armed forces arena”
Apri 2020 - their efforts will be focussed on fighting the global pandemic.
Also April 2020: the launch of Archewell, described as a charitable foundation to run emotional support groups, an educational empire and a well-bring website.
June 2020 : “over the past few weeks the Duke and Duchess of Sussex have turned their focus toward Black Lives Matter”
September 2020: Netflix deal announced - it’s announced they’ll produce environmental documentaries and an Invictus documentary
December 2020 - Spotify deal to produce audio content announced
That is…a lot, all quite scattershot, and also a lot for two people and a new foundation to focus on all at once. Obviously some things were going to fall by the wayside.
They have done a lot better since at being more focussed, but some things have been announced and appear to have never been seen of again - the 40 x 40 initiative and their roles as partners with a Wall Street Ethical investment form, for example.