A/C compressor squeal
 

I recently had to install a remanufactured compressor because the old one broke and it was working fine and I had to change the belt and it was fine but not its screeching really loud (sounds like tires skidding) and I dont know if it was because I put in freon and didnt change the oil in the compressor or what. My alternator also isnt charging the battery and I checked the bearing and it was fine so I dont really know. I really need help with this

Your belt is too loose. It needs to be very tight.