I believe you that the regime is hated.

But can you define what "this moment" is that they have been waiting for?

I don't think "this moment" helps them along the way. It is rather a reason for more internal repression.

The moment is that the regime is severely weakened and is struggling to deal with an external war, with very few weapons left. Many heads of their military were eliminated and they are scrambling to put the pieces back together.

Couple that with a population of at least 80 million people who hate the regime and only didn’t fight back because the regime had physical power over them.