From what I've seen this has been a running issue for 3+ years now.
You can filter things so well with game length, platform, tags you want to include and more. Yet not an easy way to exclude tags? There are so, so many horror and visual novel games. I get it, I like em from time to time but not all the time. I want to exclude both tags so I can actually see something new but... the only way to do that is with ?exclude=tg.tag which you can only do with a one word tag, I believe, and you can only exclude one tag AND it's not even clear you can do this. I had to look into forum threads just to find out this existed at all... And it's very, very low effort and lazy.
Why is it you seem so deadset on not implementing this when it's obviously desired? And if you can make a robust filtering system then surely a single component to exclude tags would be easy. Why are you so determined to make hiding stuff you don't want to see even harder for people? I don't get it.
Please implement it, it's such an obvious feature with no downsides. Like seriously.
Edit: My bad, you can include multi-word tags. But everything else still stands. It needs to be properly implemented.