So I actually thought of this before but couldn't find your comment that brought it up, but luckily you said something similar again so yay me.
And that is: I wonder if you weren't a bit spoiled by the Pixel Remasters and how that may affect you going forward with these games. Specifically, the Auto Battle feature.
Because the thing is, the general principle behind the random encounters in FF7 is no different than all of the previous games (most efficient way is to spam Attack, etc.), but there's no QOL update applied here like there was before, so you have to sit there and push a button rather than sit back and cruise through. And I do remember you really rolling on with Auto Battle because you'd bring it up, especially when you'd get wrecked on a "stronger than usual" encounter and had to actually pay attention again.
I don't know if the PC versions of FF VIII and beyond have any kind of Auto Battle system, but I'm afraid you're probably going to be stuck with the same annoyance you're finding here going forward, at least for the next few games until they switch away from the Random Encounter model and you'll either hate it worse or like it better. But at least it'll be different lol
It also helps contextualize, for me at least, why you're so annoyed at things like Gaea's Cliff when I didn't find it so bad for myself. But then, I played most heavily back when it first came out, and all I knew were the original SNES versions of (US numbering here) FF3 and to a lesser extent FF2 - as well as Earthbound. And as a general rule, so long as the encounter
rate wasn't too annoying I was mostly fine with it. But this is the first game in this LP series - after the six you previously played - that is actually forcing you into interacting fully with the battle system
every single battle so yeah, I can definitely see how that would get old and annoying pretty quick, especially if turn-based menu-action combat isn't your jam to begin with.