It may not be my place to share an opinion being only in high school but- I'd like to share my opinion or if you'd call it, 'suggestions'. When I write a hysterical dialogue using caps it doesn't always bring out the full picture.
Yes, you can use it with multiple exclamation marks, and yes, you can make the whole speech caps, however, it doesn't portray the character's anger, the character's fury. I like to use slanted text or just speech without caps. Yet, you can bubble up much more by expressing them beforehand or after the dialogue.
From experience, you could use it (all caps) once or twice when nothing else surfaces but, there is a much more creative aspect to writing. Using caps isn't all that bad but when you continuously use them, it simply doesn't show what you are capable of. However, repeated caps in a paragraph don't look well presented, it looks too unclean and not neat. It also conveys a sign of bad writing too. Writing is where you build a picture- just like a printer, you print it out in stages, bit by bit.
You can express their emotions and feeling through violent adjectives or use violent verbs to demonstrate their fierce actions. To express their tiredness and their feeling of being hopeless you could use different hand gestures and breathing patterns. You could paint their sensitivity, their vulnerability, and their feeling of regret/guilt when their anger dissipates through a lack of eye contact or the sudden heated tears. You can use punctuation to indicate their tone of voice, or you could use it to break up the blocky feeling of continued long sentences.
Be creative! Use punctuation to your advantage, stir up the tension, make the sentences short and snappy, and vary the lengths. Make it seem as though time has slowed down or make it as though time is sprinting away. Make it your argument. Make it in your style. Giving you an example won't spring up our imagination, writing is something everyone uses to express their feelings and emotions, which is why you can make up your own! Imagining your own scenario means printing it on paper with words, drawing the character onto paper in your way...
You could create an atmosphere, a heated oven where it takes place, make the air heavy, make it feel like oxygen is running away with every word. Make it so that it's between them- or the group. Make your eye point focus on their little things. Make it rotate around them.
Most importantly, it should seem realistic. Even in a fantasy setting where whales glide in the sky, we are all human, even the little aliens are- in a way, human. Our bitterness and frustration all flow the same. Your character may have large furious eyes, they may sweat, they may carry fast breaths, wildly wave their hands, clench their jaw, clench and unclench their fists. Being observant may help with how you draw your character's anger!
