Internet residencial

Does anne else have problems with there home internet saying that it has excellent signal but it has no signal or weak signal and it always buffering when I'm watching a movie on Paramount or it says that I have no internet connection but showing excellent signal .I switched from spectrum because of there bull shit ways with my bill and crappy CS but I didn't want to go from that to this. I've done everything that they suggested on moving in to a different spot but still not getting the same service I had if I knew this I would have gone to a different company all together but since I've been with TMobile for 18 years I thought that it was the right choice but now I'm not sure