...but Merkel opening the floodgates to mass migration
Please don't replicate right-wing talking points. She didn't open any gates - she just decided (contrary to all countries around us) to not suddenly shut our open borders when millions fled war and were seeking for refuge.
She basically did, what she always excelled at: sitting it out and doing nothing, then selling it as her political success. Active change was her constant enemy.
What can be done is to stop electing neo-liberal/right-wing/conservative politicians in the EU, so Frontex can be turned upside-down to do the job it's needed for - helping people at our borders, instead of actively or passively killing them!