It's not even watchable in a silly, grand allegorical way, like the second and third movies. It's completely flat, with little premise, no narrative or character arc, no justification for its complete brutality, and a steroid-pumped mute who sounds and looks like he's suffered a massive stroke in the main role - and even then he's part of a collective of mercenaries.
I gave it the benefit of the doubt early on, but that cockney ex-SAS guy insults just about everyone's intelligence.
Ohhh....I see why that pissed you off.
What if he was American?
But dude, worse than RAMBO 3? That movie where Rambo helped the Taliban? Where he defeats the whole Soviet ARMY on his own?