Things like https://en.wikipedia.org/wiki/Goodhart%27s_law happen regardless of political regime or economical system. In different situations they take different forms: in capitalism, companies try to maximize (short-term) (perceived) shareholder value; in socialism, they try to maximize the favor of the ruling party. In capitalism, your values are important proportionally to how much money you have; in socialism proportionally to how good political connections you have. In capitalism, sometimes people starve to death; in socialism, sometimes people starve to death.
The world has many problems, but lack of military dictatorships controlled by a communist party is not one of them.
Of course, unless you meant "actually, true socialism has never been tried yet". In which case, sure, as a rule of thumb, imaginary countries do not suffer from real problems (unless the plot demands it).
Expanding on a topic necessarily encompasses a superset of cases such as the contrast provided
There's N.Korea, but that's not controlled by a communist party. It's notionally controlled by people who call themselves Communist, but they don't appear to do anything ideologically communist.
World politics isn't my strong point, where did you have in mind?
I note that your structure was "in capitalism, {capitalist ideological outcome, those with capital own the means of production and leech off the value of others labour}; in socialism, {activity directly opposed to socialist ideology}".
I'd say 99%, at least, of companies are run under capitalist ideology; to accrue wealth for the owners. So why blame socialism for the upshot of capitalist activity.
New factory, with athletic courts (and maybe a stage/multipurpose hall?) for the workers: https://dprktoday.com/content/great/4/sajin/image/2020-05-02...
Kids wearing red kerchiefs in botanic: https://dprktoday.com/photos/18301
Inspecting big industrial things: https://dprktoday.com/photos/18390
Party meetings (other pics show voting by holding up cards, but the colours don't seem very distinct to me): https://dprktoday.com/photos/15113
Ski resorts: https://dprktoday.com/news/43327
Doctor's outfit, multi-ethnic star: https://dprktoday.com/photos/18257
Rods instead of chains on swing sets: https://dprktoday.com/content//photo/2020/20200527-03-1.jpg
Makeup only in demure colours: https://dprktoday.com/content//photo/2020/20200527-01-2.jpg
Apartment blocks: https://dprktoday.com/content//photo/2020/20200318-01-1.jpg
Karaoke (was this actually soviet, or only post-soviet?): https://dprktoday.com/content//photo/2020/20200418-01-2.jpg
Comrades painting: https://dprktoday.com/content//photo/2020/20200502-02-2.jpg
Gender-balanced propaganda statues: https://dprktoday.com/content//photo/2020/20200421-pt18041-1...
"75 years victory"?: https://dprktoday.com/content//photo/2020/20200318-pt17942-3...
[1] traceroute is useless these days, and its whois registrar appears to be chinese.
Bonus /r/fullcommunism: "let's study" https://www.youtube.com/watch?v=ukBcC-sK3wQ Unless they're trolling hard with the english subs, the chorus is about studying for a better future. I know grades were important for early selection in the Young Pioneers, but can't immediately think of such a swotty song in the soviet catalogue (choreography and backing band, however, is spot on). Closest I manage at the moment is the educational background of the main characters in the movie "Three Plus Two."
For instance, I consider "Девушки фабричные" to have been a soviet trope (an image search reveals factory girls existed in the west as well, but don't seem to have been so frequently propagandised) and sure enough, here they are in the DPRK, even clasically at textile machines:
https://dprktoday.com/content//photo/2020/20200309-pt17906-1...
https://dprktoday.com/content//photo/2020/20200112-pt17518-2...
(among the machines I spotted on the site is a mask-making machine. Covid is a common denominator this year.)
Science fiction is pretty much always just about things that already happened. “What if we maximized a non-human value?” is just a subconsciously repressed way of asking “Did anyone notice we’ve been maximizing non-human values for a couple hundred years?”