I believe it's not about whether the game is actually any good or not. It's about what Highguard represents.
Let's be honest, hero shooter isn't an oversaturated genre in any sense. Upon looking up what hero shooters are available right now I managed to find around five of them: Overwatch 2, Fragpunk, Valorant, Apex Legends, Paladins. If Highguard survives it will be the sixth.
That number is a joke compared to boomer shooters (which itself I'd argue isn't oversaturated in the first place) and downright sad compared to metroidvanias or deckbuilders. Don't even think about incrementals. But those releases don't get this near unanimous levels of animosity from the community.
The fact is liveservice games completely lost any goodwill they once might have had. 90% of the time nobody is excited when a new one is announced because almost nobody respects this genre. It's primarily seen as a soulless, corporate product made for maximum profit potential, and nine times out of ten that is true. Even if you give one a shot it can disappear a few years later (or two weeks in case of Concord), so all the money and time you've invested is down the drain. It's no wonder people look at this game and immediately start thinking about the apology tweet and the end of service announcement.
I believe if hero shooter devs want to be taken seriously by the community they need to adopt the Xonotic model. Xonotic is a community developed open source arena shooter. In Xonotic hosting and moderating the servers is the community's job. This immediately solves everything and is the reason a game with a playerbase measured in dozens can be sustained with effectively zero monetization. Translating this to a commerical title can be quite tricky but I think it has great potential.
Its over saturated because each of these games gate unlockables either under microtransactions or enough time that it effectively becomes the only game you play.
Boomer shooters welcome other boomer shooters, they only have a finite time worth of content before you're replaying them for the sake of replaying them.
I don't agree with that definition of "oversaturated". Yes, hero shooters demand way too much time investment from the player but at the end of the day there are seven of them at most.
And that leads to a problem I forgot to mention in the main post: Even if a hero shooter starts out as a good game, it can still be ruined down the line. Combine that with a lack of alternatives and you are effectively stuck with the game you have picked years ago. You don't like what Overwatch turned into? Too bad, take it or leave it.
Also the insane commitment demand isn't fundemental to the genre, it's a consequence of the blockbuster approach developers insist upon taking with this type of game.