All my pumps are now Lezyne (2 mini pumps and the high pressure track pump (although now I don’t road bike I wish I have the high volume track pump instead) and somewhere I have the mini track pump (although as I’ve not seen it in a while I assume someone has borrowed it) and they’re basically indestructible. They’ve been dragged around Europe in all weather conditions, strapped to bikes and left outside, used as lightsabers by toddlers and (on one occasion) found at the bottom of the paddling pool when we got back from a weeks holiday(?).
Never had a problem with them unscrewing valves but then I’ve always made sure they’re nipped up nice and tight.