FUN! I love a challenge. Let's see. I'm wrong, am I? RAW.
Okay, so if someone is playing intrigue or mystery or horror (DMG 38) then they are "simply wrong."
If they are playing with madness and sanity (DMG 252, 265) they are "simply wrong."
If you play with intelligent monsters that use skirmish, missile, and hit & run tactics then you are "simply wrong."
If your monsters focus fire on the players and will kill players that are down (instead of allowing whac-a-mole) then you are "simply wrong."
If you use slow, milestone leveling then you are "simply wrong."
If you combine slow natural healing and gritty realism (DMG 267) then you are simply wrong.
...or, if you play with injuries (DMG 272) or massive damage (273).
All of this before getting into house rules (some campaigns remove cantrips, or have rules for speed and spellcasting).
Yes, I guess I am simply wrong for not playing 5e in the way that you demand. I will give you your money back; I suggest you lodge a formal complaint with Crawford.