Hate to say this, but SOMETIMES it is what you pay for that you receive.
It is hard to make the right angles and cuts and holes. For me, Measure three times and cut two times. One cut just shy of the projected line and then the actual line to get the right cut as a fail safe. That is why my stuff takes patience and time.

I made a few brackets over the years for 70'-72'Dusters, 65' B-bodies and 68'Cuda and they were time consuming. They do look stock and are strong and light, but no one will pay for your time, let alone the materials. I did 'em as a favor for the fun.

I'm sure you will get all done eventually. Your car is light enough as it is IIRC.