system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] When I watched Civil War, I was extremely nervous for Ant Man the whole time. What if someone gets it into their head that the best non-lethal way to beat him is to damage his suit? There's a good chance he dies horribly, right?

I mean, you fight Iron Man, you expect the suit to get banged up. But Ant Man's suit might as well be a space suit in MCU. Are there failsafes or anything?
gpt
Only if the wearer attempts to shrink or grow while the suit is compromised. Don't forget that the helmet is retractable/removable depending on the version. Also remember that Hank attempted to go subatomic before wasp but was unable to due to the suit being damaged so depending on how the suit is harmed determines what side effects are. But it won't be detrimental if the wearer is already grown or small. It protects the wearer against pym particles but those are what's used during the shrinking or growing process, it's a much lesser degree to maintain the size. Remember the goat was what was dying not objects during the tests so it adds a layer of protection here, but the suit itself, while offering some trauma resistance isn't thick enough by any means to not be torn, as Scott was able to be tazed and also said he felt cold when riding an ant. 

So through and through, it's not immediate death for the wearer if the suit is compromised during combat, it's much more likely however for the wearer to be stuck in whatever size they are at if it is damaged.