If you don't need the "advanced" zoom features, I can highly recommend Jitsi. Free public service and you can self-host if you need it. We have been running a fully remote company with 90% of meetings via Jitsi since COVID with great success. I recommend Chrome over Firefox though, as FF's WebRTC support is behind Google's.
Yeah, though I don't really understand your privacy/security model. If you are worried about being targeted directly by Google or some three letter agency, you certainly should not use any of this technology. Instead, you need to go back to the basics, to something running on a physically segregated network, with a much smaller attack surface area. If you are just worried about being dragnet tracked, you are way better off with Jitsi than Zoom even if you end up using Chromium to connect to the session.
Well for me it does, at least to some extent, as I use Chromium built by Arch Linux and run a new clean profile for each call. I highly doubt Google is collecting my actual data (not metadata), like AV streams or even web history, in this configuration.
Most "free markets" in the US -- certainly all that matter -- are dominated by 2 or 3 players, and when they all agree to do the same sorts of anti-consumer things, there's nowhere to go. Even if Teams or some other small player has better ToS now, who's to say they won't do the same thing tomorrow? Or do it anyway, without telling anyone?