How bad is doom eternal multitasking?

I was talking to friends about Dum and it seems the multitasking is pretty wild, with constant weapon switching and lots of different tools for mobility.

It's real? Because if that's the case, then it's an Exclusionary game toward the non-sweaty ppl. And I like doom too much I don't want to think that about one of my fav franchises:((

Also my biology teacher said "we are animals of focus,From our prehistoric hunting methods to modern jobs. The best way to accomplish something over extended periods is to see a task and complete it entirely with a specific tool", and Doom Eternal Looks like many scattered tasks with many different weapons. And honestly I'm kinda scared because i can't change weapons constantly, I never learned how. I would like a gameplay like classic doom or tf2 I don't know if somebody can help me.

Sorry if I sound mean English is not my main (I had adhd as a kid and I probably still have some)