Next, why would a business failing to make a profit be immoral? What exactly is immoral about a business failing? If it is so obvious, maybe you can explain how it is immoral and exactly who is being immoral.
Next, it seems like you didn't understand what I meant when I said they failed to meet expectations. I meant the investors expectations.
However I think you're mistaking harsh criticism of Twitter's execution and return on investment, for a moral criticism.
Just as it is "ok" for a business to fail, it should also be "ok" for people to criticize that failure, especially if they believe that critical mistakes were made by the leadership they entrusted with their money.
I'd assume they tried and failed. It's the simplest explanation. On the other hand, attributing a moral component to it implies deliberate malfeasance (such as deceiving investors), which would require evidence.
So, in the absence of that evidence, attributing a moral component to it would seem hard to differentiate from conspiracy theory.
Saying that Twitter expected success is just both a projection and an anthropomorphization on your part. As you are not psychic, and as Twitter is made up of a large number of people, not a person with expectations, you have no way of knowing if any of them expected success as they marketed themselves for more cash.
They either deceived investors or are failures. Take your pick. It's just odd that you can't even understand how someone could see a moral component to it.