a retro pixel art style wouldn't be so aggressively mixed-res. not only are the pixel assets not locked to a shared pixel grid, but the nearest neighbor scaling on the text means it gets stretched in irregular ways if the window isn't PRECISELY sized. and that's not to mention the CGs, which on top of being the majority of the game's assets, aren't even trying to be retro pixel art.
fix the awkward scaling, and either commit to your aesthetic or scrap it.