About the duckduckhack platform, I was writing a client for it so that I could make searches without opening a browser[0]. But their api is limited. The searches supported by that platform are limited to short and common keywords, and their main site is not open source at all. Kind of disappointing to me that the only way to get all the search results is with a web scraper right now. I still prefer it over Google for at least trying...
0: https://github.com/wlib/duckgo