Audio video issues

I have had Comcast for over 30 years. My service in the Philadelphia area was great. I moved to south Florida 10 years ago and service has been faulty. I assume many of the issues were related to service in a condominium. I have recently moved to a home in western Delray Beach and I had hopes that all would resolve. No. I experience constant pixelation in the video and disruption in audio. I do not understand as it is a new development. I cannot handle any further fruitless discussions with AI or contracted customer service. If this can’t resolve I will leave Comcast after 30 years.