Nice workout, is that a 5x5 PR on the squat??
Do you lift after work? Sometimes riding a desk all day is worse than manual labor in that it drains your energy in a psychological way. Sometimes napping more than 20 min. or so can do more harm than good too, lol.....I don't think you're tired due to genetics, I think it is more or less mental.....do you get better workouts on weekends when you can lift when you want, rather than going after work? Also, what does your eating through the day look like.....lack of food or the wrong stuff at the wrong times, as well as dehydration can lead to feeling zapped.
If you don't want to discuss XtremePumpz69 anymore, fine, but you're the one who will suffer with sub par pec-delt tie-in development, and thus pick up less chikks on 'myspace'.