Max, stop and think for a moment or tow about complex it must be to steer an economy. There are countless moving parts to consider. Goals are clear: maximise sustainable employment; stable prices and moderate long-term interest rates.
What influences are at play? Weather, global trade, innovations, welfare, the list could fill this page and more.
Where I'm heading with this is: it is easy to sit back and criticise when one doesn't have a clue about the influencing factors of so many moving parts.
The more apt question would be: where would we be if Central Banks had not made the decisions they have made. Your question presupposes that there was a perfect solution and it was not taken. We live in an imperfect world with uncertainty at every corner.