I feel you, I just had the same experience playing the final-final test level in Super Mario Wonder. I needed like 120 tries to do it and I started questioning my life choices
But then I did it and I felt amazing! And I think those experiences absolutely need to be in games as well. Overcoming difficult challenges is tough in life and if we put them into games, they might just show you that you CAN do everything if you just try and try again, even if it seems impossible at first.
Every time we ship a game, the best moment that makes it all worthwhile is when we watch players play our games and they get to a point where they feel like they just can't do it and then they overcome the challenge and that moment... is just priceless.
All that said, again, this is an RPG. There are tough enemies and bosses to fight, but if you struggle, the easy mode is simply to nope out and come back later with OP stats