I don’t think filling Google repositories with complaints and well-intentioned, but garbage issues/pull requests. At best they’ll just delete them occasionally and at worst work less in the open, changing permissions on repositories, doing discussions more in internal tools.

What you can do is support alternative browsers, get other people to use them too and notify news as well as your local politicians about such problems. Maybe join organizations on protecting privacy or computer clubs (in Germany, support e.g. Netzpolitik.org and CCC).

Maybe acknowledge what the in-principle good things about WEI would be and support alternative means of achieving them. This proposal uses good things like less reliance on captchas and tracking, a simple to use API to enable a huge potential for abuse and power grab. Alternatives might be a privacy pass, as mentioned by WebKit https://github.com/WebKit/standards-positions/issues/234