There is no quote from Charlie Flanagan apart from to suggest he voiced scepticism over Tereasa May "assurances"

Scepticism over assurances of an open border.

"UK does not want a hard border Jim, just Dublin and the EU""

That is what I said and it is totally accurate.
Britain does not want it, but EU probably does.
The Republic is part of EU. What EU wants Dublin has to want too. Members of EU can not decide how their own borders are controlled.