I have a buddy who did gun repairs, he fucking hates AR-15s. If you want a gun that ticks all the boxes, get a 12 gauge shotgun. It's a cheap, widely available platform that has cheap and widely available ammo, it just fucking works, it's easy to care for, easy to use, pretty standard maintenance, and will kill what you need it to. They're lethal much further out than video games imply, because otherwise they'd completely wreck the balance of the game.
Edit: I asked him for his specific beef with ARs, this was his response.
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They're a bitch to clean. There's lots of places that need to be cleaned that can't be reached easily, tons of little pockets and grooves you can't get into; requires a dental pick, star shaped cleaning patches, and a shit load of cotton swabs to get through.
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If it's locked up, you can't knock on the charging handle or emergency kick the charging handle to clear it. You will not be able to field strip this rifle if it's jammed out of battery.
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Aluminum gas blocks are apparently very popular, and they will corrode to failure at the gas tube port.
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The extractor pin will often shatter in place, which causes intermittent failure while not looking wrong unless you know what you're looking for.