There was already a controversy over Zoom marketing their calls as "end to end encrypted" when in fact they're only encrypted on the way to and from Zoom's servers, where they're unencrypted (and easily wiretap-able).
There are a variety of better Zoom alternatives from fully end-to-end encrypted peer-to-peer ones like GNU Jami (which requires an install) to Jitsi Meet, which runs in a browser with better quality¹ and IMO better ease of use than Zoom but requires running everything through a central server (though at least allows you to host it on your own).
That's part of why I mentioned Jitsi and not just Jami. The former supports partial p2p on one-on-one calls, but uses a central server to support 50+ person calls (though they do recommend 75 max on the free instances they provide IIRC).
There are a variety of better Zoom alternatives from fully end-to-end encrypted peer-to-peer ones like GNU Jami (which requires an install) to Jitsi Meet, which runs in a browser with better quality¹ and IMO better ease of use than Zoom but requires running everything through a central server (though at least allows you to host it on your own).
1: https://www.nytimes.com/wirecutter/reviews/best-video-confer... See also https://en.wikipedia.org/wiki/Jitsi