I can agree that it being a tranqfest is a legit complaint, but you can't deny that Metal Gear has always been a tranqfest (where it was at its worst especially in 3 and 4) and the AI have always been really abusable since the days of MGS1. At least some kind progress was made on the tranq being less broken by having limited suppressor/ammo.
Its also why I usually don't do those helmet/riot suits/body armor deployments since I can try new things instead of tranqing my way through the game.
4, yes. Buying things from the pause menu made scrounging effectively meaningless. I never played it on the hardest difficulty, though, so that might have been corrected there? Not sure.
3, though, I cannot agree at all. Unlike 4 or 5 I never felt like I had ammo and suppressors a few buttons and seconds away, so I genuinely tried to come up with creative methods to get past encounters.
Sorry it has taken me so long to reply, I cannot peel my eyes from this fucking game Dan's playing.