what? your processor don't have any paste on it? that's your main problem if you are doing that. your airflow is another problem. you have 3 fans (psu, back and side) blowing in at the processor. turn your 4inback panel fan around. you should also consider putting a 4inch fan in front of the hdd (it's not important now. do that in the future).
everything looks fine
I used stock cooler and it comes with a thermal pad so I just stuck it on there, then I thought "With the stock cooler you don't need thermal paste because it comes with a pad right?" so I took it off to check and there was the paste on it so I put it back on but I probably should have spread it out or something.
side fan I can't tell which way it's blowing, but my rear fan blows air out the back.