So some morals of the story:

Regime change is accomplished by whoever can move about the area with impunity, and evict any rival dominant force using rifles in direct confrontation.

Operating against the civilian populations of opposition sympathizers is nothing more than an extension of gang warfare and vigilantism. This is not regime change, it may or may not help accomplish the next regime change, and may in fact cause legitimacy problems for whichever side commits the most policing action against the non combatant population, even if it is the non combatant enemy sympathetic population.

Boobytraps, sabotage and guerrilla action reduces the effectiveness of a defense garrison which is likely to come under attack from an enemy conventional force. It cannot force the regime change until the rival force "owns the flagpole".