Not sure that I'm only facing this issue !? Whenever I upload some screenshots from my PC for my post, It was looking blurry during the preview and after the publish.
If you look at my recent post Azure Synapse Analytics(workspaces): Deploy and Debug - Part 1 most of the screenshots are blurry. I tried with many different ways to get screenshots like snipper, Snagit nothing seems to work for me.
Eg.,
Some of the screenshot like
