This is just ridiculous paranoid thinking. Sometimes a product is just shit, no matter how much you wish it wasn't. There isn't always an ulterior motive behind a negative impression of something you like, and this is one case where it's almost universally accepted that Rocksteady fucked up and released a subpar product to try and make a fortune off a trend. It's even worse and more noticable with SS because the studios pedigree is best in class when it comes to superhero games, and even regarded by many as one of the best in gaming full stop.
Not only that, but companies SHOULD be held accountable when they do stuff like this. If this was a sportsperson who has amazing form, transfers to a new club for an extortionate amount of money, and then just half arses every match, they will get stomped on by fans and media alike, and this is human nature.
If SS was made by an unknown developer or someone who was known for releasing subpar products, people would expect it. It would still get shat on for being a shit game, but nowhere near the level SS has been. Thats largely because Rocksteadys previous trilogy was exceptional in pretty much every way and they sell out for this shit to try and cash in. With the level of skill their team has customers RIGHTLY expect a hell of a lot more from them in terms of mechanics and effort put into their products. This is a copy/paste, half arsed effort to jump on the MTX/BP train, with repetitive missions, no substance, no depth, not even a good loot system when its a loot based game, crap crafting mechanics, low enemy variety, I mean what you expect people to say? If anything the people who need a reality are the ones who dont understand why people are 'crapping' on the game, not the ones 'crapping' all over a crap product.
It's almost like they think people are stupid enough to buy any shit they put out, and then buy skins/battle passes and all other shit on top of it. To me that's a scummy way to view the people that pay for your products. It's not a case of people being upset that some enjoy this game, I mean who gives a fuck if it's half of GAFS GOTY? It's more because of the precedent it sets as far as I'm concerned. As always though, you say one thing negative about something people like and they assume it's attack on their very existence as a human being and post LOL and triggered emojis cos they cant handle differing opinions.