Oh dear god, another retard who compares A First-Person Shooter to a third-person tactical combat game!
Resistance 2 is not Gears of War. Get it through your fucking skull. You cannot compare the two games directly, any more than you can directly compare Tomb Raider to Mario Kart.
Now, by the sound of things you are claiming the game is shit because you can't bear to look in the mirror. Yes, Resistance 2 has no Cover Mechanic. Nor does any other FPS game! You claim the game is hard, but I've beaten it on Normal, and am over halfway through on Hard, and there were very few areas that I got stuck... and when I did, it was usually because I was being an idiot and not making proper use of allies and cover.
Seriously, it is not hard to use Cover in Resistance 2. You crouch behind a wall, work out roughly where the enemy is, then pop-up and shoot. So long as you duck before you take too much damage, you'll be fine.
The flippant "weapons are lame" comment really shows you're a clueless little tosser. Every weapon has a Secondary Fire mode, ranging from grenade launchers to homing tags to force fields. Alright, Resistance 2's armaments are not all shining gems of brilliance, but none of them are crap either. The Auger "Mark 2" is an amazing weapon! It goes through walls, you can see enemies through walls, and it projects a dome of energy that can deflect any and all weapons fire. The only reason this isn't the only weapon you use for the whole game is it has a slow rate of fire!
And that brings me to the second point on weapons; they all have flaws. This is not because Insomniac did a shit job, it's because everyone else does a shit job! The Shotgun is intended for point-blank, the Bullseye is for close range, the Carbine is for close-medium range. The Rossmore is far better for killing than the Carbine, but you have to get close. The Bullseye does more damage than the Carbine, but is less accurate. Therefore, the player has to decide what he needs to complete his mission. Likewise, weapons such as the Marksman and Auger are not as good for sniping as the Fareye, but they aren't as good for 'brawling' as the Bullseye or Carbine - these weapons are intended for medium-long range fire-fights, ideally from cover, where you don't always have the luxury of lining up a precision head-shot.
This weapon balance shows up best on multiplayer. The Bullseye is far more dangerous up close, but over distance the Carbine wins. The Marksman is far better than either of these at range, but in a head-to-head you will usually be unable to fire fast enough to stop the other guy gunning you down with the Carbine. Again, the weakness of each weapon is what makes it both balanced, and tactical - the right weapon for the right job.
Resistance 2 is by no means a perfect game. No game is perfect. However, it is an excellent FPS, and the Resistance universe is one of the best game settings around. It is the weaker of the two in terms of plot, no question, and in some areas it does seem they are using the jaw-dropping graphics to hide gameplay flaws (such as the notably inferior "Red Ring of Death" health system that replaced the "Hybrid" Health system of Fall of Man), but it is still by no means a terrible game.
Oh, and I can't stand Keyboard and Mouse FPS games - PCs are for RTS games.