TL;DR - Like it or not people make snap judgments but there's alternative approaches you can take. Be the change you want to see in the world.
Though I'm a firm believer that if you can't make a good game with just default assets and no plugins, you can't make a good game even with custom assets, here's a little devils advocate:
What if on a lark Square decided "Let's make an rpgmaker game with just rtp assets and put it out on ps4 and pc."
Would you play it? Perhaps, given Square's reputation. Or you'd wait for a review, but at least be open to the possibility that it'd be worth your time, right?
Well then, think about it. Who are you? Particularly, who are you that people should be open to looking beyond the surface of your rtp game and assuming there must be good gameplay and story?
They're going to assume, and in most percent of cases they'd be right, that you got rpgmaker thinking you'll rtp, autogenerate, and yanfly plugin your way into the ranks of "solo game dev" and dismiss it out of hand. Sure, IF they had taken a chance they might have been entertained enough by the gameplay and moved enough by whatever story you concoct, but why should they?
Is it fair that you're expected to surrender even more money to commission custom assets to be worth the time of most people? Maybe not, but take it up with 'most people' if you don't like it.
Or, there's other ways.
One, you could stop trying to become the next Square, and make a game entirely to your sensibility instead of thinking of what others like. Then if you want, put it out there, and let people take it or leave it. You might think "how does that separate me from the other low effort types?" Easy, it's all in the intent. You aren't trying to desperately gain game dev clout, you're just putting out a work of passion and maybe asking for a few pennies on itch or something for it. And people might be able to sense the difference between those trying to bluff their way into a reputation, and someone who wanted to share their hobby.
Two, you are not alone. Find the others who would prefer to focus on gameplay and story instead of custom assets and see if an accord can't be reached. I mean obviously one commonality isn't enough to make a lasting friendship and I'm not saying go bother seemingly like minded people, but it's clear the community isn't completely one sided on the issue.
Three, one idea I've had is a game jam, particularly a game jam where the theme is that of making an rpgmaker game with only default assets and no plugins. Then the whole point would be to look past seeing Harold for the millionth time and seeing how you make him swing.