Since parent (autoexec) has provided links to all of these claims, do not let it go to the down-vote hell and disappear.

Why Markmonitor is terrible: https://news.ycombinator.com/item?id=43712299

Why Zoom is terrible: https://news.ycombinator.com/item?id=43712438

If you think it is not enough to call them terrible, reply to these comments as to why not.