This is a fantastic game. Definitely grindy by today's standards. I also remember getting it when it came out and how many hours upon hours I sank into it. I would also say using something with savestates and maybe some other strategies to cut some of the grind out.
It’s only grindy if you’re trying to 100% it. I’ve blazed though it multiple times without grinding at all, though maybe that’s because I’m so familiar with it.
If you fight every encounter in the game, you can probably 100% it too (in terms of completing all the quests). You might have to do some of them in a particular order, and grinding will definitely make some of them easier, but it's definitely not a game I would call grindy.
Though some people do consider a game to be grindy if running away from most random encounters and only fighting the bosses isn't enough to get to the end, lol