You’re absolutely right there.
When the intervention in Libya started I wrote a blog stating that the western powers had been wrong to intervene and that when Gadaffi was deposed it would be necessary to leave an occupying force in the country for years to keep peace as there was no organisation capable of replacing ‘Mad Dog’.
I was attacked by leftists who accused me of proposing a return to colonialism. “We had to intervene to avert a humanitarian crisis,” they screeched.
“Hang on,” I told them, “I have been against intervention from the start, I’m just saying what the inevitable outcome of intervention if we are not prepared to follow up and run the country until a viable political system emerges.”
Had we not got involved Gadaffi would have killed a few hundred rebels to cool things down and things would have returned to normal. As it is there is still armed conflict between rival factions years later.
I think things would have gone the same way in Syria had Russia and Iran, for reasons of their own, not propped up Assad.
Gadaffi, Assad and Saddam Hussein were rather unpleasant tyrants, but they did keep a kind of order in their parts of a very unstable region.