Are you connected with the creator of those assets, by any chance? And using this topic to promote your game is bad form even if the rules of the category don't forbid it explicitly.

Do people browse the recent section for assets? Really?

There is about two ways this will turn out.

If there is rights violations, that account will be removed by Itch sooner or later. And there most likely is an issue here. You cannot have brand names in your assets and project titles and then use them in games, without having those rights and the rights to redistribute. And I cannot belive that this publisher has those necessary rights. But Itch might be slow to take action or does not do anything, unless people make them aware of the situation. Also, I am not quite sure who made those assets. The huge number alone indicates usage of ai, but they are not marked as such. And what is very concerning, there is no word at all about what you actually buy in terms of rights. This is supposed to be assets. That's important to know, and the project descriptions say nil about it.

If everything turns out to be ok, those assets will be buried in obscurity. Or Itch might decide to revoke indexing privileges for that account because of the flooding, unless they are ok with that, for whatever reason.

Using this in a user style browser extension and changing the user name accordingly will at least hide those users. 

@-moz-document url-prefix("https://itch.io/game-assets") {
div.game_cell:has(a[href*="//example-user1.itch"] ) { display: none !important }
div.game_cell:has(a[href*="//example-user2.itch"] ) { display: none !important }
}