Cleaning the filter

I am literally dying in my condo. Though technically I have central air conditioning, there must be something wrong with it. No matter how cool I set our thermostat at, the AC can only make our beach house around 75 degrees! There must be something wrong with the cooling system right? I don’t suppose people always deal with this problem. I have tried looking up what to do to assist the AC, plus nothing has worked. But online said that it could be a cooling filter issue. If the AC filter is obstructed with dust, the AC does not do the job as well. It is sluggish, tired plus not as effective. I looked into it plus our air conditioner filter was fine. I still cleaned the air filter anyway, just being hopeful there though, then another possibility I found online was to vacuum out the inside of the cooling system. I cleaned the fan blades, wiped the cooling coil plus cleaned out the condensate drain too… Cleaning the AC component seemed to do entirely nothing to its effectiveness. The most recent thing I tried was messing with the refrigerant levels. I added more refrigerant thinking it might act as like fabric softener. It might provide our cooling system that extra kick. Nope, I still am dripping with sweat to death due to not really fantastic AC. I am running out of ideas on what to do for myself. I don’t think that I can go on with the current cooling situation much longer. I sweat through my clothes plus sheets every night. Eventually I will need to be comfortable in my condo.

HVAC installation