I honestly see your fears as way overblown. The current deposit protection scheme and the solution in case of bank bankruptcy only exists since 2014.
As it stands it’s very unlikely that you’ll have a situation where deposit protection is needed. That’s because the banking system has mutualized any eventual catastrophic losses, meaning that if a bank is in trouble, every other bank in the same country has to chip in with money for a bailout, so costumers aren’t at risk of money loss.
Only if the situation is so serious that the necessary funds would destabilize the rest of the banking system, would the deposit protection be activated.
And, at least in paper, what would happen then is that you receive letter or email explaining the situation and asking for an IBAN so that they can reimburse your money. It supposedly takes 1 week to have your money back.
I’m sure you can find online all the regulations explaining how it works, this is just a summary of the multiple reports on the press here in Portugal in 2013/14 after a major bank here went bankrupt in 2013