Repeat:
That Monospace is worthless to me, it's way too wide. How can I get like a guaranteed 12 X 24, 32 X 64, 48 x 96, 10 X 20 for all characters?
Choose a font designed in that 2:1 ratio by its designer. Arial isn't a monospaced font natively, as that "W" is 3 times the width as that "l". Check your system for monospace fonts and see how they're designed. Many are on a .5 ratio, a few are .6, and I've seen some that are .8 ratios. It all depends on how they were created at design time.
The only monospaced TrueType fonts shipped by Microsoft are Courier New, which shipped with Windows 3.1, and Lucida Sans Typewriter, which was included in the TrueType Font Pack. All other TrueType fonts included with Windows 3.1 and the TrueType Font Pack are proportional fonts.
If neither of those work for you, get one from here that you like:
https://www.1001fonts.com/monospaced-fonts.html