The National Council of Resistance of Iran in the article linked above certainly shows the difficulties of the current regime. Putin's Russia has many of the same problems .Then there's MAGAland perhaps higher up on the downward slope. And let's not forget Bibi.
No matter how much we all wish one or more of these deadly leaders gone, we should not forget that each has strong supporting constituencies .
Each could stay entrenched for decades or moments before a sudden collapse.