The phone application had a few updates between the failures and the success, so perhaps everything's sorted out. I also need to give the desktop native application a try.
I'm rooting for them, I really hope we get a viable free software option. But we should be honest about the state of things right now.
Considering your alternatives with zoom clients being banned it's not that far of a stretch.
* We run into so many issues screen sharing, usually it's just that the persons screen doesn't show up, but it's also often way to compressed to read
* Even just 1 on 1 it makes my laptop cry, with 5 or 6 people in a conference I have to minimize the application or I cannot use my laptop at all because of the CPU load, and at 12+ people even with the application minimized it was maxing out my 2017 Macbook Pro CPU
* For comparison, I recently was in a 230 person Zoom conference, laptop hardly noticed
* I often have audio issues and it requires restarting the application or chrome before it fixes itself
* Really the performance of it is the biggest reason I hate it, we tried having a "lounge" where people join it and just chill while working, but we stopped because once a few of us got on it our computers just became unusable
If you are using firefox you will encounter issues