
You’re conflating. While I don’t disagree that Valve is soaking up money, and when it fleet-of-yachts money, it’s just as sickening as when any-and-everyone else does it. Where there’s a difference is in the ‘How’. While I have my problems with Steam, generally speaking, they offer a good service. They provide servers and bandwidth while selling games far cheaper than their closest competitors, by one means or another.
There’s also how they’re using that money as a company. Right now, I can think of three different lawsuits Valve is involved in just off the top of my head, all of which are fighting to worsen the hobby for gamers and Valve is opposing. Obviously, it’s in Valve’s interest as a game’s marketplace to keep gamers throwing money at them, but the ‘Why’ matters a lot less in this circumstance that the ‘What’. Even if it’s not the express purpose, Valve is the only company I know of that’s putting in any amount of effort to defend consumer rights in the gaming space. Everyone else with money comparable to what Valve has are too busy trying to exploit the market or diminish Valve’s share while providing nothing as close to as good as Steam.
News that has come out since your comment involving Valve includes an agreement with Facepunch Studios to make Source 2 available to public without any licensing fee under the name of s&box. While it’s obviously in Valve’s interest to increase the possible amount of games that will be sold on their platform, and Facepunch have done a significant amount of heavy lifting in making Source 2 both available and useful to the masses, that’s still Valve doing their part to make the gaming community a better place and provide an alternative to the (in some people’s opinions) over-used Unreal and (horribly untrustworthy) Unity.
As Zorque has said before me, Valve aren’t angles, but I truly believe Valve is bringing a net positive to the market, unlike any other company with comparable bank balances.

Same can be said for any entertainment media in a way. Tiktok (for those people) YT or even films. They’re all ways to spend one’s time, even if they aren’t direct competitors. For those who choose a balanced approached between all of them, there’s really only time left in a person’s day for one or two of these kinds of games, let alone their dwindling funds for everything else that is increasing in price.

I don’t like all the Checkpoint Charlie bullshit and got fed up with the side content before the main story was over, but the world in Tsushima was so well made that I had a good time in it - far better than AC: Shadows (that I didn’t pay to play, for the record) - and the combat system was fun. Yotei has a character that isn’t forced into the peg hole of a samurai and has a greater selection of weapons so it looks like it’ll be a fun time.

write the same sorts of things on game boxes
Don’t be ridiculous. You’re describing criminal property damage. Of course that’s neither okay, nor the same.
I’m sorry you feel the need to be dramatic about this issue, but Steam have provided adequate tools for the userbase to handle the problem, in my eyes.

This is developers who don’t like criticism whining. Yes, there is some bigotry and such in the market, but it’s not as big as they’re making it sound.
These people want Steam to step into a role of world gaming police, even though Steam have provided the necessary tools for users on the platform to vote incorrect information down into oblivion. Going further than that is asking for censorship and is as effective as paid reviews.
If you can’t cope with your product taking criticism, valid or otherwise, don’t waste your time peddling what you’ve made. We’ve seen time and time again that games find their audience, even with BS ‘criticisms’. Those who are interested will look further than the basic complaints. If there’s only those complaints, maybe you just didn’t make a very good game.

What’s your buy-in cost at this point? Have you already got a powerful xomputer that can game and run OBS? Mic and headset? You don’t have to bother with a facecam if you don’t want to, but if you want to, you can use something like iVcam to use your phone as a webcam. If you don’t have a mic, I recommend Tenor’s line of products. I bought a good quality condenser mic with adjustable boom arm for ~$40. If it’s something you definitely want to do, there are ways to try relatively cheaply and possibly upgrade your equipment if you find it’s a good fit.
Should be a very final ruling.