The solution here would be for Microsoft to add a "hello will be ignored" option to Teams so I can just check that and have it look like Teams is saying back to them " please write more then just hello "
It does not work that way in my place. You write "hello" and if there is no immediate "hello" back, then you leave this aside until there is. There is no staring at anything.
That is why hello is annoying. People are capable to talk immediately, but take forever to finish writing.