Cedivad seems to be the only one with the cojones to actually sue.
It's not a question of courage. It's a question of expected return.
A positive return from suing may seem unlikely to some, especially if you account for a non-trivial time and effort it would take to get there.
Consider: If HashFast successfully retains the batch 1 Bitcoins the gain for them is approximately 15 million dollars (assuming 400 batch 1 units, I don't know the actual count) over being forced to refund. This means that if spending 1.5 million dollars on defense gave them just a 10% chance of success, they'd come out ahead in spending it.
It's actually somewhat worse since they might as well spend up to the full amount fighting it, since it's probably already a fair multiple of the liquidation value of the company... it seems like that if they lose they'll have spent every cent they have on their way there, and so you'd get nothing but their intellectual property rights— which aren't worth _that_ much, as evidenced by the fact of there being quite a few other chipmakers.
You— a one or two or whatever device customer— are standing on the opposite side of that equation. If you win you're likely to get nothing because they'll have spent it all on defense, if you lose you'll lock in a >80% loss plus your legal expenses and time. At _best_ you break even, since they almost certainly couldn't afford a defense, and making batch 1 whole, and punatives.
Effectively, what you're asking for people to do is to double down on their losses for a small chance of recovery and a somewhat greater chance of making a point (and perhaps liberating an image ready design which is rapidly aging).
I think thats a lot to ask for, and I think hashfast is doing the same calculation too. It's not that no one has any
cojones, it's that HashFast has their customers by the
cojones and HashFast knows it, otherwise they'd be trying to offer some olive branch at least. I assume the delay in making the statement that they were intending to renig on their original deal was because they hoped they could ship in time and avoid ever disclosing that they weren't going to make good on it, due to the resulting loss of goodwill.