Metal Gear Solid - MG Rex Boss Fight (But Done Right?)

I've always thought the fight against Rex sucked ass because all I could ever do was run around tossing chaffs and shooting stingers, rinse, and repeat. It was always tedious, frustrating, unenjoyable and it never once felt like it was even testing the actual skills I'd been amassing all game long. Well, turns out, I'm a big silly goose who, for twenty years, never realized stealth was a fucking thing in this boss fight. Soooo, guess I've got egg on my face there. \_(:/)_/