Cannot send text messages sporadically; texts are received without issue

My service has just been lacking or nonexistent for about a year now. I'll reset my wifi and phone and call TMobile to troubleshoot and get no help. The claim on the commercials from other service providers is that TMobile customers are being deemed as unimportant and so the service just cuts out. It's called 'deprioritized'. I recommend switching service providers, ATT told me they'll buy me out of my current contract with TMobile :)