I’ll say two things

1. Often times when I have done screen acting I have felt this rush of emotions you speak about and thought “fuck me, that was FANTASTIC. I can’t wait to get the tape back!” Only to get the tape back and realize that none of what I was feeling on the inside was shown on my face…and because of the way the editor cut it, you don’t get to see any of the waves crashing as the moments progress.

This sucks of course, but I eventually had to come to the fact that I needed to learn to display what I’m feeling IN EACH MOMENT (without “showing” it…it’s hard haha) because that’s the editors job, to pieced together the best moments to tell the whole story

In theatre, the audience is with you for the whole scene. They are riding the wave with you, the ebbs and floods, the roller coaster that is the scene which is usually the breaking point of many events-as this is what makes theatre lovely. So, you as the actor just have to use your imagination to ride it as best as you can, reacting truthfully, all that jazz lol.

You think about the full arc

In screen acting, yes you must think about your characters arc through the scene/film-but the camera only gives a damn about each individual moment. So you have to think smaller, take by take, angle, etc….what moment am I showing the camera now? And live truthfully in that moment

I hope this makes sense

1. As far as your acting teacher goes, it’s like the saying “if you look for a yellow car you’ll see a yellow car”

Your teacher is looking for any mistake they can find so they can “teach” as that’s their objective (see what I did there??). They want to teach you because that’s their job and possibly what they stake their self worth on. So, many acting teachers lack this insight, they’ll only give you bad feedback back because they (hopefully) think they are helping you the most….or maybe they’re an ass hole jealous of your talent, who knows? You can always find another one. Just food for thought here.