It has been no fun for me for about a week. Started posting again yesterday; it hasn't eaten one of my posts yet, but I use a "work log" (a LibreOffice document) to compose in, as a general rule.

It is constantly spinning while trying to upvote.

I think I found something:

It seems that the spinning behavior is worse when you're looking at a feed and left-click a link, which causes it to appear "above" the feed, and you can click outside of the white background to dismiss it and go back to the feed.

When I had done that, I upvoted two people who I see regularly, as well as your post, and it kept showing the "can only upvote every 3 seconds" (which was behind the post, grayed out in bottom left -- another UI issue). I clicked outside the white to go back to the feed, then I did a middle-click of your post to open it in a new tab.

Then I switched to the tab and saw that two of those upvotes had been recorded. I made the third, and then started writing this comment. Which I'll Ctrl+A Ctrl+C before I hit Tab Space, just in case.

I agree with you, having to take so many extra steps is madness. And is causing me to walk away -- just as I made a significant investment! :(

Good news though is I learned more about MinnowBooster delegating in the meantime.

https://steemit.com/life/@libertyteeth/really-fucking-discouraged-right-now-just-put-another-btc-into-steem-power-and-can-t-fucking-upvote-anyone

https://steemit.com/steemit/@libertyteeth/just-delegated-almost-everything-to-minnowbooster-for-now-my-100-upvote-at-100-voting-power-is-only-worth-usd0-07-now-so-i-guess

https://steemit.com/life/@libertyteeth/minnowbooster-is-a-great-investment-16-5-annually-that-s-after-a-month-of-daily-data-points