I think the Russians shoot themselves when they get chased by drones because they know a bullet through the skull is a less painful way to die than getting blown up.
Anyway, as someone who's been through military training, it sounds like a pretty inefficient way to do it. I don't know about Ukraine but where I'm from you would have to fill out forms, wait for a recruiter to give you an appointment, get passed his interview, sign more forms, wait some more (weeks possibly months), get through medical and mental exams (wait weeks again), get a physical test, wait again, get sent to basic, wait weeks/month to even get to the point when they'll allow you access to a live firearm (all supervised), finish basic, wait weeks again, get sent to infantry training, and then you can start considering having a live weapon without constantly having someone breath down your neck 24/7. Though, you will never be alone, you'll never get peace or quiet, you'll always be in someone's sight since there's always fellow trainees with you and most armies implement the concept of a "battle buddy". Your battle buddy will follow you everywhere you go and vice-versa.
Honestly at that point after going through all of this you might not even feel like killing yourself anymore lol