As for Avalon, I calculate Yifu stole on the order of 250 000 bitcoins fron his customers by keeping batch 2 for himself. Simon has done a terrific job of promising things he can't deliver. He hasn't stolen what he promised to deliver as of yet.
Yifu robed the customers of their profits, not of their paying BTC. There's enormous difference, since everyone was refunded the full amount BTC paid, both for batch #2 & batch #3 miners, and for chip batches. We all already said farewell to our HF profits, and are almost certain to get only 1/5 of paid BTC amount back in refunds. So I don't see how keeping 250.000 (or any amount you claim) of customers profits is worse than robing them of both profits and what they've paid.
As someone said this may be bit of topic who is bigger garbage, HF or Yifu, so I'm also out of this discussion.
In hindsight... a better MPP would be to refund the miners any difference between the cost of the original system and what it would have mined in 90 days (in BTC of course). I think many would have preferred that to more hashpower later.