Flat Speed Square

I wanted to print the Carpenters Speed Square 250mm by KRMICH29 flat on my build plate, but I had to make one side flat while the other side has a raised lip to accomplish this. I tried printing it with PETG (my printer has a history of not handling PETG very well), so part of it didn't print at all (hence why the bottom half of this 3D print looks like a mutilated mess of plastic). This does not mean the STL model itself is damaged or something, by the way.