I have an example that speaks to your idea of "I want to do everything, and I want to do it now" movement that is prevalent in the D&D community today.
I got banned from a Twitch channel. It was a channel with a wanna be CR crew (They have set up their own Patreon, website, the whole deal). They had a whopping 26 in the channel at the time, while the DM and players were doing the funny voices, dressed up for the camera, the works.
One guy decides to cast Haste. He reads the first sentence in the spell, where it says he gets a second Action, but conveniently stops before reading the next sentence that clearly states what he can do within that spell.
So, he casts Misty Step to jump up 30 feet into a tower, (no problem there), then proceeds to cast a non-Cantrip, and then a second non-Cantrip (one of the concentration based Smite spells as he attack the NPC a second time).
This is what got me banned, within seconds:
vince_snetteton: This guy just butchered Haste. He has the mechanics all wrong. Read the spell. You can only do specific things with the spell, and he had already cast Misty Step, which is a Bonus Action. The DM has to know the rules, as well as this guy./
vince_snetteton: You guys can play D&D, or you can pretend you are in a Critical Role production. You can't do both. You are clearly not playing D&D.