open q: what’s the best / most respectful way to offer product feedback

eg. there are a few products I used or heard more about at Basecamp/FEST and I’d like to offer my critiques but not in a bashing manner 

have thought one cool avenue could be @0xdesigner style concepts for parts of products I’d like to see reworked

building products /neynar, hacking /farhack, yapping /dylan | dylansteck.com

show don't tell.

you can give your opinion, but a lot of people can do that, its not actionable.

if you can show them the problems, making it self-evident, then you won't hurt any feelings.

loom, screenshot, anecdotes are all useful