The reply to that LinkedIn message is exemplary of Eurostar corporate culture. An arrogant company that has a monopoly over many train routes in northwest Europe and believes itself untouchable.
It looks like they might finally get some competition on UK international routes in a few years. Perhaps they will become a bit more customer-focused then.
They're so government adjacent that they've forgotten they're not a government.
A whole lot of government agencies and adjacent evil corporations behave exactly like that.