Sorry, it just might not be your cup of tea as a puzzle game. The game went through multiple rounds of playtesting, and it's already at a far easier difficulty than I first imagined as you can brute force all of the main fights with a single build. I've had people tell me it's too simple and easy sometimes, and I've had people tell me it's far too hard. That's why I put a cheat item in the game that let's you skip all the main fight: because I know the combat is not for everyone. If it helps, you should reconceptualize the game as a series of gimmick fights where you have to find and solve the "trick".
That said, I greatly appreciate you taking the time to write feedback out for me. Ultimately I know this is more like a conflict of expectations, and I'm not quite sure how to phrase it better than what I've already done in the description.