You keep saying "as someone who spent hundreds of dollars on an SSD" and mentioning your SSD...no offense, but why did you but a ps4? Clearly you want PC gaming....I for one love the PS4's implementation of installs. Clearly you are some kind of obsessed with SSD's so you must know the PS4 doesn't have one, so the anger here seems misplaced to me. Whatever though, to each his own. It isn't "poor design" seeing as even you admitted it's great for 90% of people. In fact it's wonderful design, you'd just prefer it be worse...forcing a player to wait for a 50GB install is worse. Sorry if I sound like a dick but I find your attitude about this to be very off-putting. If you "demand" excellent load times and are "willing to pay for it" then go back to your expensive pc....no brainer here.
Well at first blush that cpu/gpu combo is a mismatch. That's a budget cpu, and an older one, with a pretty top of the line gpu. I'd install the GeForce experience for an easy way to check your gpu drivers and maybe try some nvidia control panel editing (forcing vsync, threaded optimization, performance mode, etc). If you're still having issues it might be time to buy a new cpu that compliments the rest of your rig.