Do all of those things come up in a single round for you? I think you're exaggerating for effect.
I mean, I could just as easily list out all the possible things that might also occur in a D&D round which could slow things up: figuring out which characters are surprised, calculating critical hits, does someone have Advantage, spellcasters trying to figure out what spell to cast (often spending part of their turn re-reading the spell), players trying to figure out what they can use a bonus action on, range, cover... the list goes on.