It took years grabbing these as they've popped up for decent prices, just recently grabbed V to finish it off. Wish III had been released as a GBA cart.
If you love the older FF games, I do recommend the Pixel Remasters. They don't come with the extra content they added for the GBA/DS re-releases, but they are very good remasters that do a great job of keeping the pixellated look and feel one might (generously) remember while visually improving everything in just about every regard.
I've been eyeing the collection on Switch! Just hard to justify when I have so many other ways to play those games already. My money is finite, unfortunately.
I do love the soundtracks though, and that also makes it tempting. I play a lot of theatrythm on both 3DS and Switch.
Ouch, my sympathies. That's the point where I'd unapologetically use the built in cheat modes and auto battle back to catch up, but even then that's a pain to work back through. At least it was just 2 and not one of the longer ones like 5 or 6.