T-mobile 5G Home internet and VPN

I have contacted my work IT department and they have no clue about handling this other than providing me with local (geographic) VPN URLs which work ,  but they also have the same bandwidth issue over the t-mobile network.  At this point I am not going to spend further time and effort on this issue .  The onus is on T-Mobile to resolve this, which they seem to conveniently shrug off and point the blame somewhere else (every other network , i.e Comcast, Verizon etc work). I am just packing up the t-mobile gateway and returning it.  Will have to stick with Comcast even if they are a pain to deal with.  This whole ordeal was not worth it in the end.