Home internet becoming unreliable after few months

Unfortunately, pretty much the same story for me. I stress tested the heck out of t-mobile internet the first few weeks I had it. It was great. High speed across multiple devices running video, streaming, gaming, VPN, etc. it worked great. The last month or so has been rough. For the most part, it maintains a good connection, but inconsistently drops. Often times, I switch back and forth from WiFi  to hotspot simply because of the inconsistent signal/reliability. Strongly considering switching back to a more reliable service since I also must work from home. So tired of the intermittent loading/spinning wheel on video (both on mobile and streaming TV) or flat out drops. Have rebooted modem multiple times daily, lately.