The new HTML formatting Squarespace implemented for the emailed version of Form responses is bulky, clunky, difficult to read (on both desktop and mobile), annoying to forward (or choose to send) to anyone who doesn't have login credentials, and more. Plus Squarespace didn't warn us that they were making these changes, let alone ask for our input. Now that this new formatting has been sprung on us, Squarespace also doesn't provide any way to revert back to the old plain text or any way to edit/adjust the new HTML formatting.
Tried reaching out to Support, who were zero help. The only thing we can do is complain on various platforms in a faltering hope that somebody with actual power at Squarespace will hear -- so here we are.