The ECB is an institution that is not, and should never be, directly controlled by governments. It is set up as an independent body that is governed by strict laws, and one of those laws is that debt monetization is not legal.
You are also making the mistake of believing comments that state tat the ECB can solve the problem by printing money. If printing money was all it took to solve debt problems and increase economic activity, then why are the poor countries on earth? Why is Zimbabwe not filthy rich? Why did Weimar Germany fall apart?
The answer is that inflating away debt makes things worse, not better.