Well, i find this Argument pretty dumb, like if you go for an doctor because you have an issue with your health (obviously) and the only you can say "My Head is fine, everything else hurts...".
To basically say "the art is fine, but the rest is crap" isn't a feedback, isn't critique, it's an Opinion. Anyone can complain about let's say Mario Kart, point out they like the Character-Design, but the rest of the game they find crap, but that could be mean everything for developers. Is it a real issue of the game - like bugs, or whatever, or does this specific user simply doesn't like fun-racer or racer in general.
Well i understand, it's confusing if you imagine devs are like wizards who create whole universes with their games and ideas, but to breakt it for you, they aren't psychic, they can't read your mind and if you want to give proper feedback you have to specify your issues, so they can look into it.
So no, to ignore useless comments like "Shit Game" or whatever doesn't make an dev bad, but moreover show bad gamers | consumer, either because they simply hating, or don't understand how "feedback" works.
(edit: Also a small reminder: back in the good ol' days there were, except the QA which tested the technical stuff, no feedback from the gamers to begin with and they still crafted amazing games by their own vision. While there are Games and such, some of them early access which profit from player-feedback, there are also examples of how an game can suffer from player-feedback (or also sequels to the good games) because they have to stick to the major points of an feedback, which in our times mean mainstream and appeal to the masses, and killed already some amazing games)
The game runs worse than soggy toast sprinting through a swamp. Part of that I'm sure falls to it being in alpha (afaik anyway) but it's one of the first things that should be prioritized, more so than adding new scenes.
Well, whlie i get your point, the Problem with this aspect is, and that's something which early access games suffer as well, if you have to optimize every build (and you have to do that, because almost everytime you add something even more if its about core mechanics, it will break something and you need to optimize the game again which is pretty time consuming... also don't forget if there is behind a project dev. team in an classic sense, than often the ones who make arts and such are different people than the one do the coding, so if they would delay on content stuff like this, it wouldn't go faster anyway...), than it will take way longer for the finishing line unlike they focus on actually developing the game (core-mechanics, content etc) and polish the game near the end...