Well those get taken down by the big corpos, not really the developer’s fault. Really, the fact that they are FOSS mean it’s much easier to fix issues as lots of different people can contribute, and where you mention apps that get taken down and formed again is only possible with FOSS apps (i.e. forks)
FOSS programs that don’t involve piracy are perfectly fine though (libreoffice, inkscape, kdenlive, linux, among many MANY others), they all work wonderfully
I think they are confusing Microsoft Edge (the browser) and Bing (the search engine). You can see the Copilot icon in the top right, so it’s probably the Edge browser.