Sigh...after inspection period issues

My wife and I thought we had every base covered. Were under contract on a 2018 build in central Florida, 3/3 two story with a dual zone AC system. The inspection uncovered a few things, crack in garage slab (engineer we paid for said its not structural), small plumbing issue (fixed), and one of the two AC units thermostat wouldnt power on upstairs and there was a hole in the condenser outside.

We'ee never owned a home, or know how ac works but we asked that the owner pay for a licensed HVAC specialist to come out and check the AC system and repair/replace any issues. We thought this would get the condenser fixed and we'd be good to go. No. The home owner called their "home warranty" people and told them to come look at the ac. I am just now putting it all together. The owner bought the home for his daughter who was 19. He dog peed on the ac unit causing softball size hole in the condenser. The home warranty tech come out, replaces a fuse, and leaves saying nothing else is wrong. Our realtor now says the ac is fixed and they have fulfilled the adendum...also looks like that home warranty person was given a 400$ limit on fixes by the owner according to the invoice.

Im just now understanding whats going on. The upstairs unit likely didnt turn on because they weren't using it. It has a hole in the condenser, which means no coolant, which means its just blowing air. I had no idea ac systems were pressurized with coolant, that they were just empty find that cooled air. Putting in a new fuse means it turns on, but its not blowing cold air. Our realtor is basically saying "it works" and is now suggesting we start "saving up for a new ac" and the current owner fulfilled the addendum.

Um, we put the addendum in their to cover ourselves, to make sure we were buying a home with a functioning ac system. Realtor says it is "functioning", were out of the two weeks inspection period, and backing out now means losing 7k in earnest money. I tried asking how is this not a breach of contract? She said it isnt...

What are our options here? Crank the ac on walk through day, and if its just blowing hot air (central Florida feels like 100+ the last few days) can we just say nope, ac isnt working properly. Were not signing till it does?

I hate buying a home. Everyone is trying to take advantage...