It seems that the vents are clogged or something. I blast the ac and it does not come out through the face vents but its shoved to the foot vents. With hot air is the same. Defogger still seems to work but i noticed only 40% of the air comes out of defogger. Could it be i just need a AC maintenace job, or are my vents really clogged?

 

You likely have a vacuum leak to the HVAC controls. Look here.