The main room gets no AC

Either there is something wrong with the ductwork or the AC, even though I don’t think a thing

My brothers obtained a fixer upper home and they system to flip it; Everyone in the family has been going over to the apartment to help replace it, then the room I have been focusing on is the living room. The living room had a snacks ceiling and wood walls; It looked honestly ugly. The first thing I did was scrape the entire ceiling. I then sanded the wood walls, put a sealant on them and painted on top. The next thing I am working on is painting the ceiling. I believe it is going to take 2 coats and I need to be careful around the wood beams and not get paint on them. The ceilings are honestly tall and peaked. I have to be strategic where I put our ladder. Of course I am doing the painting in the summer time too. The outside temperatures are in the 90s and heat rises! My brothers swear they had the cooling component on and running. I can’t hardly think anything when I am on the top rung of the ladder stretching to paint. I have sweat run down our face, legs and tummy. I have to be honestly careful with hydration or I might pass out, then what is not wonderful is that this is an air vent way up high. The air vent technically should allow AC to hit me directly in the face. Either there is something wrong with the ductwork or the AC, even though I don’t think a thing. The living room is always toasty hot. Eventually our brothers need to repair this or have the apartment shown in the winter.

Cooling and heating business