@baldur as an adjacent point, these situations are also good times to make small references to #FreeSoftware. Especially when the user is being frustrated by an #AntiFeature.
"It's annoying they didn't think about this use case"
"This tool is mainly useful, it's a shame we can't change this one thing"
Of course, when to do this is very context dependent. But, every so often, highlighting why software doesn't work the way *they* want can be a good springboard.