Sub, I am with you all the way.
I fly 1nm right of track whilst oceanic and get pinged by ATC for non-conformance when crossing the continent.
Even in busy US or European airspace, most fly 1 mile right of track. No one else in the world has a problem with it. In fact it is encouraged in the interests of safety. The Chinese assign 1, 2 0r 3 nm right of track upon entry into their airspace. I think that is an excellent use of the technology we have on board and lowers or mitigates the risk if someone, pilot or controller, does make an error.
In the old days, airways were 10nm wide, ie 5nm either side of centre. We used to be able to maneurvre within it without getting clearances. When did that change and how wide is an airway these days?
Offsets obviously upset the ATC software. That's where the problem is!
(...and I have also considered selecting the ADS off!!)