You're making targeting harder than it needs to be.

I.e., if you want to shoot at 90 degrees to the target you don't ever need to figure out its aob; it'll be 90 degrees at the only time its needed.
Regarding font size the console message text is found in the menu_1024_768.ini file, which is found in the game install/data/menu path.
Using the edit function in notepad search for "messages". You want the block that has only that at it's head; not "radio messages", "group messages", etc. Just "messages"
It's commonly at group G3f i159 but if the file has been already modded that may be different on yours.
In that "messages" group you'll see a line that says "Font=x". That controls what font is used in the console messages.
At the top of the file are the fonts available to use under the heading "Fonts".
Not all of them will work in the console; you must note what number font is currently in use and only use similar fonts in it's place.
I.e., mine (and probably yours) has a font of 8. Looking in the Fonts group at the top of the file, I see that font 8 is a MFPHunt12.tga file. So I would look for other MFPHunt.tga fonts available to use.
In my file the only MFPHunt.tga file larger would be font 9.
However note: increasing the font size can lead to messages being truncated in the console. The console would also need to be enlarged to prevent this, which while not difficult to do, is a much move involved process.
Anyway, take a look at that file and experiment..............AFTER YOU BACK IT UP FIRST !

If this file isn't how the game wants it, the game won't load.
If you find something that works for you make a mod folder and you're set.