You are making a number of assumptions here.
Firstly, in the exceptional circustances we had, we could very fesibly have started when we started last season- Mid June. Approximately 3 months later, atb 2 games per week gives us around 25 games. Take out a few games for churn/internationals and we could have been at 20 games in. I think the "we could only start on August 3rd" is an understandable response, but is sort of symptomatic of the quite narrow minded, not out of the box, cautious and conservative thinking that we really needed to avoid.
On the 2nd point, there is to me no credible evidence legal action would have followed. To my knowledge there has been no legal action, never mind successful legal action from any sporting league that was voided and cancelled. There is no legal basis for it.
On the 3rd point, I am not sure West Ham would have been relegated on PPG. It would have not used PPG to decide relegation. The season was not completed, so would have just been voided and cancelled, consistent wth previous protocol. Very easy to do, no legal difficulties and a clean solution.
It's fine to say that wasn't a preferred option. I do understand that, however there were consequences for what they have done, and those who championed playing almost a 2nd mini season months and months after the 1st was ended and thus disrupting this season should at least have the integrity to own the mistakes they have made.