Russia doing the same thing. No point discussing anything with the US. They use the agreement to impede you, then when they feel they got the upper hand, break off unilaterally.
For a long time, US bases in Europe provided Stability and huge market for US goods. But when Europe started winning, US will create something to destabilise the region and make them lose competitiveness.
US saw Canadian bombardier C series planes as a threat to Boeing and imposed tariffs causing the plane maker to collapse.
Any sane federal government would have invested some money to prop up the company. But Trudeau allowed it to collapsed and eventually sold to Airbus for just $1.