T: I'm curious if you ever listened to exceptionally loud sounds at or near the problem frequencies either once-off or over an extended period of time. I also wonder if/how well the technique where you put your hands over your ears and flick your fingers works (I'm quietly hoping you haven't heard of it and it's useful :D). (I hold my index/2nd finger slightly away from my head, but mostly the same as https://trudenta.com/this-simple-trick-may-help-with-tinnitu...)

H: It sounds you're describing a death spiral feedback loop where the H increases the T which aggravates the H which...? I can kinda understand your overall worldview now. Also, how do you mean that you become angry? Sensory-overload driven perpetual aggravation ("bar-fight mode")? A feeling of core breakdown leading to an event-horizon "everything goes white" or "bomb goes off in movie and nobody can hear anything" level of fundamental disassociation? (Those are the two reference points I have the most familiarity with, to a small extent.)

Earplugs: Without wishing to ask triggering questions, I'm very curious why this input risks you ending up in ER (and (generally) why) - panic attacks, "please just knock me out" levels of T, unbearable mental stress, or...? (Maybe a combination?)

Programming: It being problematic for your brain to always be "on" is fascinating. For me, I find that my own hypersensitivity impacts my ability to access that place that reasons about complex problems and makes creative leaps, which strongly overlaps with fundamental calmness and tranquility. When I'm overloaded, it's like the pathway I use to access that place of internal calm is involuntarily monopolized by "immediate problem! must be alert" that doesn't go away and gets REALLY old very quickly. Similar to when someone's trying to settle down and go to sleep but can't because of persistent disturbance that never stops. My ability to use a given device is based on whether I can compartmentalize the bit of my brain that seems to need to remain "on" and hyper-vigilant until I slooooowly acclimatize and integrate the idea that the input isn't the end of the world, and finally relax. I'm curious if any of this resonates for you.

Muffs: Oooh. I get the impression you still have to avoid strong resonance even with earplugs and muffs in. Yeow. What level is "too much" with everything you can get your hands on?

Suicide: I was completely out of the ballpark with the direction I went in there, welp. I'm curious as to the root of your fear of death, although that's getting into personal questions that don't require answers. FWIW, my own worldview is that accepting one's expiration date is a form of obedience toward the consequences of the fallen mess we're in, and strict naïveté of the exact specifics about the when and how isolates our inevitable physical death from influence and conditioning by our fundamentally broken desires and intentions. TL;DR, I've drunk the "we probably do live forever" koolaid and think that messing with the implementation details touches things that are not meant to be touched for safety's sake, and that's where my own fear comes from.

Medical diagnoses: I personally wouldn't classify the root of unrest you're describing as being fundamentally based on a serotonin imbalance or DSM implication. It definitely sounds like something else. I've personally been trying to get to the bottom of my own sensitivity issue with VeRy PrEdIcTaBlE results for over a decade, and I can relate to your disenfranchisement about society (and particularly the medical (and educational) establishments).

Social networking: I would describe my own social interaction overall as generally "sustainably perfunctory", with HN being the primary focus I actually pay attention to :). As for the surveillance aspects of society, that's a firehose problem the world has made for itself that I'm slowly learning thankfully requires less attention and emotional investment than all the privacy sheep insist is necessary.