SASless, I'm sure a percent in the US will agree with you and share your opinions. I've see repeated what you said.
Some would say Trump puts Trump's interests before everything else. The last president that was also good for aussie ADF was Bush jr, I think he was also good with the UK defence forces. The agreements that were signed stand both countries well.
As to the rest. the pentagon doesn't share this opinion on overseas deployments, as does a long list of other gov agencies. When you break it, you own it.
Nato hasn't committed another $, than that was already agreed to before Trump.
NK hasn't changed a thing for 50 years. Push forward till the west reacts and draws the line, Go forward with unfulfilled promises, till things settle down. Then back to their fundamental path. NK won with no US/SK exercises. A big mistake on the US part.