I think a lot of people are missing the point that she's complaining about the transition period - i.e. the UK will still follow EU rules and regulations, but won't have representation in the EP anymore. People like her just wanted an immediate and complete exit, without transition or any kind of agreement etc (lolz).
That being said, there's still a hilarious point here: how could UK MEPs have ever held the EU accountable?
I thought the whole thing was just a bunch of unelected, unaccountable bureaucrats and Brexit needed to happen so that the UK could at last T-T-TAKE BACK CONTROOOOOL of their laws