I understand wanting the game to have an easy mode and not having it be too hard, but the way the game is right now is not going to be how it is later. Damage from enemies and Maya will be getting reworked and balanced in the future. And also, you're very broken right now. Especially once you find a good amount of stat upgrades throughout the game. Also, you can keep spamming either the sword wave or the flame uppercut and deal lots of damage. And you even have access to debug options to restore health, clothes, and SP.
And yeah, RossoX mentioned it already, but I didn't see any kind of potion sickness whatsoever. I truthfully think the drinking animation is a good addition and is actually rather balanced right now. Despite still being a bit spammable with the amount of potions you can carry, the health you gain is not instant, rather it restores your health bar gradually while the potion drinking animation plays. It's rather quick too, so you just need a safe spot for like 2 or 3 seconds.
Honestly the parts of the game where it starts getting hard are the latest boss additions, and the trek through the last level. And also the boss rematches, but those are meant to be hard and just an extra bonus. Once again, you still have debug commands to restore your health so saying the game is impossibly hard is a vast overstatement.