by suffering, I make my own assets. and it is this suffering and conviction that gives my art value.

Honestly, if that example is from your game then I think you are falling into a very familiar pattern of self-sabotage by being too hard on yourself. To my eyes, your overall art style looks very coherent. So it looks good to me!

I can't tell you what to do, but I can tell you what I did and what happened as a result:

I spent 20 years on my first commercial indie game. I've always been poor because of a physical disability, so I had to "hire artists" or purchase assets all along the way. As a result, my game has a lot of mix-and-match art styles because my game world in particular was very niche and there just wasn't a lot out there.

I took the sales from my release and put them back into the game by purchasing a chunk of work from another indie artist. That fixed my world tiles and environment uniformity. I also did the same for my character graphics. But the monsters... This was harder.

So I downloaded a piece of indie software here on itch, an off-brand Photoshop of sorts. In it, there was an "AI Powered Filter" (this was local so I didn't realize until just recently, it wasn't even "AI" it was just machine learning calculations. But this let me make all my monster graphics look closer to the same style.)

I am an open and out-going person by nature, and so I was honest about this "AI filter" usage on this particular part of the game.

Sales stopped almost immediately, YouTube subs poured away, and I got hit with the "just hire an artist" while holding a $12,000 receipt for all the artists I hired over the past 10 years alone while living on 800 bucks a month.

Two weeks ago, I closed the doors of my tiny solo indie dev studio and now have about $1,800 in debt I still have to pay all the artists I didn't hire.

So whatever lessons you can glean from my own experience, I hope they serve you well. 

Update!

Mate, honestly, your art looks coherent and veeeery beautiful!! 💖

That's the biggest issue when using someone elses assets or anything someone else made, because they made it in their style. 

The only true way to keep something consistent in style is to make everything yourself, how you want it. I did it with the demo i just recently released. 

My problem with art-related feedback is that they want it to be consistent regardless of the factors that prevent it from being so in some cases:  Experience, budget, external factors, engine limitations, certain contexts, etc.

There are also those who ask for better art in the game, without having any idea what the game is about artistically, as if they were asking for a different game instead of a better version of the same one. (This second point is what I've dealt with most often in a game with 7 years of development, and I couldn't afford such a luxury despite all the time that had passed)

Regarding assets, the problem is not the assets themselves, but which ones to choose to fit each project.

Artistic feedback is not like asking to fix bugs or balance gameplay; it requires understanding the game, unless there is a very obvious inconsistency.

Good luck with your game! 🎮