The government can't be blamed for an operator deciding not to operate in an area. What are they supposed to do, force Arriva to operate in Washington?
They could have stopped GNE from buying out the smaller operators though.

As for the railways, you cant blame the Government for National Express putting in a massive offer and then realising they aren't making enough money. As a private enterprise, National Express are big enough to forcast profit and loss and determine their bid accordingly.
London Midland arent the first and wont be the last private operator to have staff shortages and cancel services.

As for DFDS, Im not sure they actually ran the service long enough to judge on profit/loss. Looking at how long the service ran for compared to the period of time they ran the service - as well as the books they will have analysed prior to purchase, Im not convinced the decision to cancel it was based only on economic reasons. Especially when they needed a ferry to accomodate the increasing numbers on the Amsterdam route and did so by selling the existing ferry and moving the Norway one to the different route...