Still haven't listed WHY, like what is mechanically wrong with it? What kind of design flaws have you seen, because I didn't personally come across anything big that was wrong with the game.
Many of the ambient loops aren't done correctly.
There should be footstep sounds, but aren't.
The audio, like the art, fluctuates greatly. Some audio is actual sound while other is 8bit.
Save spots are oddly placed. I have to walk miles just to set myself up to fix an error I made in a bossfight, for example, get myself extra items from a store eons away.
You die in a bossfight, right at the end, because of something pointless, just to restart it all over again.
You die anywhere and the last save ends up to be before pointless, small things, or is generally very far away from where you had died. Pointless walking.
The game uses too much 'lul randum' humor. Not that bad though.
The art in the game differs way too much. You play as a fat dora the explorer that doesn't have the ability to make a single expression and yet bosses seem to be expertly crafted. Animation is also a part of this. Some bosses are real cool, animated real well, yet your character has an amazing 4 frames of animation total.
There don't seem to be any sidequests, and you're on a pretty linear story that just changes around like a line-graph depending on what you do.
Absolutely no settings, at all.
No volume sliders.
No graphics settings, though that's passable, because the game's not demanding.
No resolution settings. Either fullscreen or really tiny.
The random encounters you have seem pointless. Like, some of the things that the monsters do, why is that specific action physically able to do damage?
Lots of random characters that don't seem to have any reason to exist than to magically appear for some pointless fight. Some characters are actually seen elsewhere in the game, so it's not irregular when you fight them, but some things are never even seen anywhere.
You have to watch the opening cutscene every time, though skippable.
Music is way too loud at times.