I was laid off from TMUS a year ago. I was there a long time, since before Sprint. The company changed, it no longer supports the needs of the many, only the few.
If you are on this board and still employed by T-Mobile, you are stressed about losing your job. It's as simple as that. You are worried that you are next.
My new role pays similar as my old role, but with 10% of the stress. And honestly, most of my stress at TMUS stemmed from feeling that a layoff would come for me eventually. And it did.
My advice is to get out. Let them destroy the company without you. Start working on your resume, put it out there, do a few interviews. Just get out. Make that your new years resolution.