If we end up with a Boris Johnson majority ushering in a hard Brexit, you can blame Jo Swinson until you're blue in the face. Everyone else will blame Labour for its wishy-washy Brexit position and unwillingness to work with other parties.
There are plenty of places where that's not the case. 2019 is not 2017!!
If you cannot make that distinction, you're part of the problem.
Are you ignoring the fact that Brexit and the terrible coalition fallout change everything?
If you are, you're part of the problem.
It's not impossible for there to still be a decent outcome to the election, but the possibility recedes with every day spent bickering.
The fewer people who are part of the problem, the better...