DuckDuckGo's bang redirects are too slow. Add the following URL as a custom search engine to your browser. Enables all of DuckDuckGo's bangs to work, but much faster.
Theo solved this by doing all of the work client side. Once you've went to https://unduck.link once, the JS is all cache'd and will never need to be downloaded again. Your device does the redirects, not me.