Can anyone recommend me manga/manhwa/manhua with a similar vibe like this one? TIA! ヾ(...

I don't know how similar but the Duchess 50 tea recipes is good and it is regularly updated

In terms of not being happy with their isekai, death is the only ending for the villainess and kill the villainess are pretty similar. Both are manhwas with more somber tones.

For some manga with the reincarnation theme and the more angsty somber tone, the Wolf Lord’s Lady is a great one and while it doesn’t seem that way at first, I’d argue This time I’ll definitely be happy! definitely hits the tone later.