Depending on your OS, Vivaldi, Microsoft Edge, and other Chromium based browsers, as well as Safari and a few other weirdos using WebKit, all still exist. Beyond that, calling Firefox "much worse" is obviously subjective; there haven't been any credible allegations I'm aware of that Opera is "weird Chinese spy" (sic), and even though they're owned by a Chinese company now they're still headquartered in Norway and have to comply with Norwegian privacy laws; and calling Google Chrome a "botnet" is, uh, frankly weird. It's not very privacy-sensitive and that may be reason enough to avoid it, but it is not a "botnet" by any definition of the term I'm aware of.
There is Vivaldi. I used for my work daily driver and it been working well for me. One thing I like about it that it didn't have the bloat from Chrome and Brave.