the situation will only get worse then lol.
you might not like it, but the only solution to fight cancel culture is to cancel the culprits. One of the reason that SJW keep winning in these 11 years because they never compromise (and people keep tolerating them), this is also a fact.
The situation is only going to get worse if you do nothing at all, and even though this is true, that doesn't mean that any action is a solution. I'm not arguing that everyone needs to be passive, I'm simply asserting that your proposed "good start" is not helpful in the grand scheme of things.
I encourage you to take a moment and actually consider what you're suggesting. You want people to stop playing a gacha game where they have spent a variable amount of time and money. First, consider why people are playing the game. They do it for stress relief, they do it because they like the story, art, and content. They do it because it's fun. It is a positive force for them. You need to somehow get them to believe that them dropping this thing they enjoy doing is going to actually lead to some sort of change. Second, if you have managed to get them to believe they should sacrifice for the cause, you need to get them through the sunk cost fallacy to justify evaporating all the time and money previously spent. This will be easier said than done for others. Thirdly, you have to do this for a high percentage of the playerbase, enough to the point where you're actually making a dent in things.
I should also point out that gacha games (rather, all games with in-game cash shops or microtransactions) proliferate because of their whales, not your typical everyday user that makes up the bulk of the playerbase. These are the people you would have to convince to stop playing, as they are the majority of the cash flow. You then need to take into consideration that whales either likely not very conscientious and wouldn't care one way or the other and/or deal with addiction problems which requires its own form of treatment.
Oh yeah, this all is just to get people to stop playing and "bring down" one game. You also have to get them to do the same for the other gacha. You have to get them to stop watching the anime. You have to get them to stop consuming any Chinese media. You have to get them to stop supporting any business that makes use of the Chinese economy. Surely you understand that the difficulty compounds exponentially with each jump.
All this time you suggest is spent trying to get people to stop playing a game in the hopes that they aren't slowly (or rapidly, depending on the title) replaced over time could be better applied in a much more effective way to combat the issue. You are missing the bigger picture by emotionally striking out at what is most immediate, a symptom of the problem rather than the cause, and as I have already discussed, this is going to mostly hurt people who are not even the ones at fault. You can claim these are justified casualties all you want, but myself and others who are less radically minded are not going to agree and join in some baseless crusade with little to zero chance of actual benefit gained as a result of it.
Without going too far out on a tangent since this discussion extends a bit beyond the scope of the thread, in my view, the only way this problem can be solved is from within China itself. No amount of Western influence (unless we start talking in terms of bigger stick diplomacy and longer than fifty-five days this time) is going to affect the Chinese dogma that is guiding the sort of disgusting behaviors we're witnessing. This battle is not going to be won by abstaining from a video game, plain and simple. The issue of Ai Kayano's expulsion is as consequence of a larger issue extending beyond the video games industry. China has to change itself. The people have to wake up and understand the evils of the government that is actively trying to censor, surpress, and assault not only its own people but also all others who believe in free speech and thought.
The one thing I will agree with you on is that the spread of information is key and truly and honestly the best thing we can do as individuals. Educating more and more people, especially the normalfaggots and fence-sitters, about the dangers of modern day China, their politics, and their ongoing anti-individualistic philosophy is the most you can really do. Playing these little guerilla wars with video games developers (who themselves are very likely not favorable of these changes, as can be seen by how both Azur Lane and Girls' Frontline figures reacted to censorship of their characters previously) is exactly the sort of waste of time the real malicious figures love to see.