That was the story why Epic was chosen. It was made to be a dilemma between Epic and Cerner, by design.
In reality it's not a dilemma. In other cities and countries there are EHR systems from other vendors that work less bad and with lower cost.
I don’t know if the alternatives - e.g. Oracle Health/Cerner - are really that much better - and if Epic is as bad as you say, I suspect that says more about their corporate culture than choice of programming language