So something thats happening to me a lot is a room will be invaded by roaches or molerats and they are beefy because at the time i was unaware that upgrading rooms caused more dangerous spawns. I can usually keep people alive with stims but since i don't have many weapons everyone runs around like an idiot. i cant select people because they hide behind eachother. so there is a pile of people and the one i want to select is obviously in the back and as a result they die... is there an easier way to heal during a crisis? I really wish there was a "stim the room" button. where i can just push that and it gives everyone a stim pack even if ones used on people with full health are still consumed and wasted.

No there isn't that I know of. I've suggested they allow you to heal anyone in a room that is under attack simply by clicking on the room if you have stims available.