Well you are in luck: https://archive.org/details/MSPaintWinXP
I use this all the time on my Windows 10 box.
Just download, rename to "mspaintxp.exe" and put it in C:\Windows\System32. Optionally update Paint shortcut to point to that one so when you type "Paint" in start menu that's the new default.
It's really sad that one of the world's biggest software companies can't make a fully-working calculator.
added: totally necessary proof https://qui.suis.je/drop/peakfun.png
Paintbrush was the closest thing I could find here, but it glitches out on me occasionally and the UI isn't as simple. I may just take the 20 minutes to do what you recommended under Wine. Thanks!