I've just bought a game on steam and had to create MS account in order to play it
but holy shit, it's the first time I couldn't complete the captcha and I tried like 10 times
You gotta select square which contains to identical objects something like 5 to 15(!!!) times - the more you fail, the more challenges you have to do
Just take a look at those graphics
https://i.imgur.com/zOYqWGI.png
Some of them are easier and some waaaay harder
I think that's actually a dark pattern. I was testing the captcha myself and noticed that at the beginning, it would show a progress bar with 5 segments, but after completing the third one, it would increase to 7 segments. I had a screen recording going so I know this is happening when I'm not making any errors. However, after looking at the screen recording more carefully, I noticed that the initial 5 segment progress bar didn't actually say there were only 5 puzzles. Only after completing the third puzzle (and the progress bar got more segments added) did it say "x out of 7" puzzles. My guess is that they do this to make the captcha seem less daunting and to decrease the abandonment rate, while simultaneously not technically lying.
screenshots demonstrating the above: https://i.imgur.com/a8RM4Ot.png
FWIW I got the captcha correct on the first try, after 7 puzzles total.