You clearly have a chip on your shoulder about something that happened in your games. Aside from the Monk, the short rest class are fine pushing through an ordinary encounter without their full ressources in my experience. I suppose it would be better if they could handle 6 encounters back to back, but, really, once they're out of juice the encounters would just end up being the same slog over and over so I'm not sure how great that would be either. Just a Warlock plunking away with Eldritch Blast for 4 encounters while the Fighter swings his sword and forces the Cleric to just spend all their spell slot on healing to keep them topped off enough to keep going, losing any versatility they might have had with their spells otherwise.
Basically the rest schedule sucks, and everything would be better with 10 min short rests.