To clarify, I'm playing on a computer. This is probably not an issue on mobile.
UI Improvement: "Resign" Button Placement
Problem solved. I made a chrome extension (Never Surrender) that removes the resign and draw buttons for daily games. lol.
Edit: Added a link, since it got approved and published.
It only removes the draw and resign buttons for daily games. I mostly made this for myself, so right now you have to disable the extension entirely to bring the buttons back. It's easy enough to do, but if anyone installs it and wants me to take the time to make a toggle button or something, let me know.

I too have resigned 3 won games by Fat-finger.
Moving the resign button is one solution but maybe more logical to disable it during analysis mode.
Anyone from chess. Com admin listening?
The makers of the hit Chrome extension Never Surrender are proud to present...
Sometimes Surrender (Removes the resign and draw button for DAILY games, but only when in analysis mode. Also moves the confirmation dialogue to the top of the screen.)
Eh. It didn't take long to make. And it was fun!
It's like 50 lines of hacky Javascript (and 5 lines of CSS to override the confirmation box style).
It would be much less for chess.com team, though. Most of the code is making sure the page has loaded, locating the footer/buttons, and making sure the extension fails gracefully if they update the site.
I think @Erik should give you a job after this.
The stakes are a lot lower for me, a random user hacking together a chrome extension, than the developers responsible for rolling out changes to millions of users.
Kudos to the development team. I don't need that kind of stress in my life.
Putting the resign button immediately next to a button that is frequently double-clicked (back in move history) is probably a bad design decision.
At the very least, the "confirm" should not be [so close] to the resign button, so that a player has to move their mouse [further] to confirm the resignation.
It's very frustrating to lose 100 rating points by accidentally resigning when I'm in a winning position: https://www.chess.com/game/daily/294955866
EDIT: I made a Chrome extension (PC only) that implements these changes. Sometimes Surrender (Removes the resign and draw button for DAILY games, but only when in analysis mode. Also moves the confirmation dialogue to the top of the screen.) [source]