I saw this method before, but it didn't work yesterday. But now it works like a clock! imo, this is an ugly workaround for such famous website
Maybe you had a typo. And for that specific exclusion, there were only like 2 games filtered out on the first page.
It is not a workaround. It was specifically coded to do what it does. Scroll down a bit, there is the link to the 5yo thread.
Maybe that feature is not requestet that much to warrent coding the version with multiple tags and search integration. Or even integration of that quick unadvertised addition to browse. I did not even know, that Steam could do such a thing. And I bet most people do not even know they can use negative search terms in search engines with a - sign. Because that is, what tag exclusion is: negated search terms.
I mean it's a workaround bc there is no UI to turn this on.
I personally use excluding filters all the time, in Steam and many other programs. It's a big QoL feature for better searching.
Moreover, on this website, it's a BIG NEED feature - just open the popular games tab, it flooded completely with horror games. Sometimes I don't want to play a certain genre, BUT I always know what I certainly do not want to play. It's where this feature comes in handy.