Nothing bugs me more than an otherwise good movie where its villains keep doing things that make no sense. "Bad Guy" AIs seem to get the worst of this, as a lazy writer might feel they can get away with more because the villain's inhuman nature forms a handy barrier vs audience deduction. The Matrix AI, Skynet are probably the worst offenders that I can think of from the top of my head.

Colossus goes in that delightful bucket of "yep, working as designed . . just a wee bit too efficiently". Putting myself in the computer's shoes, I'm not even a hundred percent sure Colossus/Guardian is even in the wrong, morally. Thermonuclear technology might be genuinely too powerful for late 20th century politico-military systems - I'd buy that.

This notion - of freely giving control to a fantastic machine - was probably as alien to a man from 1960 as letting the computer watch you f*#k. Both of those notions are probably easier sells to the people of today.