CAL4M1TY on 15 March 2008
Gears > Resistance for me.
I could give you all a list of reasons, but it'd just be the usual "it's fresher, looks better blah blah blah"
I think the reason you're not liking it so much madskillz, its like what squall_leonhart said, it's a first gen PS3 game rushed to make it to launch. Also, you've played Halo 3, Bioshock and COD4, games that were allowed to be finished and didn't have to meet a certain deadline (also they came out a year later), so I don't think you could compare it to them fairly.
If you pick up Resistance 2 on day 1, I think you'll have a better experience.
