Hello Polar Moon,
Well, as I said, the engine RPG Maker is designed for 2D top down RPGs and you used it for a first person point & click so I think the issue is not that you are too ambitious but rather than you use the wrong tools to achieve your goals. I suggested you to use the engine Ren'Py, do you know this engine at all? It is designed for visual novels, which is why it came to my mind while playing your game because I believe that it would be the perfect engine to run your game.
Oh I can assure you that my PC is powerful enough to support RPG Maker, it was built for hardcore gaming and I did check the resources consumption while the game was running and my PC barely felt your game at all, I mean to say that my PC didn't break a sweat to run your game so nope, the issue is not my RAM nor my CPU nor my SSD, nothing was wrong with my hardware. Moreover you tell me that you tested the game on a crappy PC and it worked fine so it really is not a hardware problem. The game didn't lag nor crash for you? Because for me, it was a pain to play because it lagged all the time and crashed very often. But technical issues were not my biggest pain with this game, my biggest pain was Fujita Anju, I hated being stuck with this bitch all the time, reading her inner thoughts were a torture, I hated her with all my heart and I do confess that I cursed you many times for making me play the least likeable of all your characters.
Why did I hate being Fujita Anju? Because she is a bitch, she is extremely judgemental, her interactions with other characters are 99% judging, looking down and scolding everyone because her life goal is to be the most normal possible (meaning monotonous and boring) and she expects everyone to be as boring as her, she doesn't tolerate any originality, every time someone shows some originality, she judges them, she looks down on them, she scolds them for not being "normal", moreover she spends her time having existential crisis, she can't do anything at all without having an existential crisis, I can't express enough how much of a torture it was for me to read her endless inner monologues, it was not an enjoyable experience to be stuck with her, she is definitely the least likeable of all the characters and I spent the entire game wondering why you chose her to be the playable character when anybody else would have been much more fun to experience, Fujita Anju has completely ruined the game for me, I hated being stuck with her, I would have enjoyed the game much more with another character, she was boring, annoying and a true bitch and I felt relief when she died because I was finally free from being stuck inside a judgemental bitch who has endless inner monologues, that's how I experienced the game.