My memory of all 3 crackdowns is that they are all essentially the exact same game, 2 almost quite literally. So saying one is significantly worse than the others feels weird to me at least and more like a symptom of when you played them vs expectation. 1 and 2 came out so close to each other they where basically a blur. Like the only personality and differentiation they had between them was the Voice coms telling you who to kill and why.
2 giving you mobs of zombies to blow up, instead of just more gang menbers on top of a cooler looking suit and a glider, put it over the top for me personally even though I can acknowledge I was doing the exact same thing at Basically every moment in all 3 games. Which is obsessively scouting the horizon and listening for the hums.
That's a play box series that deserves the Earth Defensive Force like treatment. Make a super cheap sequel every few years that looks and runs slightly better each time with a few new toys. Publishers NEED to play with the cheap iterative sequels market. Everything can't just be AAA and gass