I think wit is hard over text. To you it's obvious you're joking, and that your joke is that this comment is ridiculous.
To others it can read as someone making a joke with little respect for the Original post.
Take the meth one for example, I can see you being downvoted for that if the original post was serious.
The UK one just sounds stupid though, but then again mods of a Lemmy instance are likely to be people that take things (like Reddit fucking their API) quite seriously. This means our population pool may be a little skewed towards the serious.
On the other hand, I've seen lots of humour here. Especially from the AI generated community with their, a'hem, themes.