Doors are impenetrable bank vaults when your crew is trying to cut through them, but the AI treats them more like finish line tape to sprint through with a fist-pumping victory cheer.
This is especially galling when your own crew can't pass through non-upgraded doors the AI walks through without pause when an enemy hacking drone magically transforms them into the aforementioned bank vault doors. Apparently your crew hasn't been doing their exercises and can't push aside those bead curtains hanging in the doorways when the hacking drone locks out the curtain rod controls.
Not sure what you're talking about. The mantis Swarm gets through them just fine. A bit annoying, but not too hard. Now, a hacked door. Oh yes a hacked door now that's a bank vault on both sides.
Also, stop using your Engies to try and break through doors. No wonder they're too tough for you
AI's put out fires like Smokey the Bear from the United States Forest Service.
Your guys put out fires like Firemen from Fahrenheit 451.
Smokey? I mean only you can stop starship fires, but I don't think I've seen Smokey take out a single fire. Unless you mean both sides are pretty bad at taking out fires. Although considering how many times a fire starts on your ship but not theirs, they are the aforementioned Firemen and your crew just happen to take Space Smokey to heart in preventing starship fires.