The low metacritic scores in my opinion come mostly from 2 parts. The game was simply not ready for release. If TWI really needed to release something at that point to obtain money it would probably have been better to release in an minecraft fashion to just ask money to participate in a beta and later allow people get a free update to the full game.
In essence that is just a name, but it delays the period where people can say the game is still in beta. And will put a hold on final reviews, as reviews come and logically talk about the state when the game is released.
But another part is that a big part of the old core community felt betrayed by past made promises by TWI with regards to for instance weapon rarity and load outs. While as put by TWI that this forum consists of 0.01% of the community implying that this forums opinion is unimportant, statements like that often upset the community even more.
But while perhaps a small group of the community, it was a core part of the community that for instance often posted loads of positive reviews on for instance meta critic and other forums and now instead a lot of that group now post negatively. Its a similar reaction in a sense to when IW stopped dedicated servers and while at release loads of players played it and loved it, user reviews were really down as the vocal part of the community felt betrayed.
So it might not mean a lot from a money standpoint, but when word of advertising is the main source of advertisement it might hurt a little. A lot of people here just bought games based on the goodwill from tripwire and wanted to support TWI through the bugs. And for a good group of people both the bugged release as reactions that the opinions in these forums don't matter take away a lot of that goodwill.
In the end all of this probably wont matter for TWI, as TWI said they made more money on HOS than all previous releases of them. But for me as a player, I don't care for company revenue i care for people on the servers, and the fun I have with a game. While game revenue is high, the max player amounts per day atm are very low, when compared to say killing floor and ro1 this time after release (and those releases were not bug free either). Future patches, free weekends and price drops will of course increase things, but for now from a player standpoint HOS is doing worse than home front did.
I've never been a player that cared much for realism, so things being non realistic doesn't touch me much. But how that the realism community that has always been an integral part of the community, is being shoved away does irk me. Especially as they are not so much asking the game to be changed for all players, but just want to be able to play the game in a mode that is as realistic as possible (a lot of people thought that the realism mode of the game would offer this for the old roost players).
For me the big issues in RO2 however are some parts of the gameplay. The mod and ostfront had a mystical weapon balance, weapons were truly different and not so much better than the other, we now have clear weapons that perform good in every possible scenario and are clearly better than other weaponry, and in high amounts. What I like about the ww2 scenario is the high variation in weaponry where different weapons complement each other over the good for everything scenario of assault rifles in modern combat (i had no issue with the stg in ostfront even if it was available for every smg). Gameplay turned away from epic firefights, to more a game where you mostly kill people that never saw you, and that you get killed mostly be people that you do not see.
The lockdown timer often stops maps in the middle of the game, not when a team is getting slaughtered or clearly losing it just stops it halfway.
I hope the best for TWI and RO2. But current events give me a sour taste in my mouth. If anything I probably wanted things to change the most from how it was in RO1, but I hoped that TWI would try to still please all the main user groups from RO1 in RO2. You can't please all but the preferences of the main groups of Roost were clear. RO2 still got loads of potential, and the first time I played it I was amazed by the initial feeling, but when finding how the actual current game play is simply lacking in fun for me.