> For yet another example, all the passenger rail services in the US went bankrupt after they were forced into collective bargaining with unions.

Yeah, no. The railroad industry is famously boom-and-bust cycle, with virtually every major railroad overexpanding during boom years and going bankrupt in any economic downturn, this happening both before and after unionization. Passenger rail itself was killed not by union featherbedding but by competition with the automobile and airplane--and government regulation that prohibited railroads from being able to cull unprofitable routes (as you needed government permission to cut a route, which it was disinclined to give even after the railroads were in poor health.)

> For another example, Bombardier in Canada was a successful airplane manufacturer, and the demands of its unions gradually sapped its international competitiveness.

Bombardier's troubles (to my understanding) largely originated from its attempts to push up into larger aircraft, bringing it competition against the Boeing/Airbus duopoly, who did not look kindly to a new entrant and brought expensive cases against Bombardier, which forced Bombardier into a partnership to survive.

My sibling comment already tackles the US auto industry one, so I won't cover that.