Like, literally everyone has been telling them since the very beginning that this was going to happen. All of them ignored the warnings as fear mongering and now act shocked when it happens to them.
If someone realizes they fucked up when they voted and regret their decisions I can kinda get behind that sentiment. But at this point in time and where we are now, if you still act shocked that this happened to you then that's what you get. Some people regret their vote because they realized too late how fucked it could get while other people only regret that it's affecting them instead of just the people they wanted.