Batch run 1742 clips

How would I batch run 1742 clips that each need the same color correction and cropping?

You have to make a script. You can choose a language of your choice. The script needs to generate MLT XML. Use Shotcut to generate a sample project and then figure out how to make your script read it, change values, generate a new XML, and process it with the melt or qmelt executable provided with Shotcut install. qmelt is a simple Qt-wrapped version of melt that better initializes the Qt runtime environment that makes some things like GPU processing and WebVfx happier depending on your platform. Safest to simply use that.
More information can be found in the documentation section of the MLT web site.