according to most walkthroughs,the warrior trophy is given to u once u kill all enemies in midtown,i spent 1 hour+ in 1 run and nothing was spawning and still got nothing even when leaving the level. I've tried over 10 times clearing out the entire place now and have gotten nothing,wtf am i supposed to do?

I was unable to get it on Easy. On Normal, I got it on the first Midtown visit (I think it has to be); the one where you escort Le Roi. I didn't drop him off at the exit glyph until I saw the "Warrior Trophy Received" text. I had 254 kills. I hope that helps.