1. Yes. As an advocate for a popular vote, you can simultaneously acquiesce to electoral college results that don't align with the popular vote and advocate for its abolition at the same time.
2. Every democratic loser for president of the United States has expeditiously conceded and aided in the incoming Republicans' transition. The general liberal-leaning MSM hasn't all claimed that the votes were invalid and no democratic loser and their allies have ever filed a flurry of spurious lawsuits to overturn the election as well as convincing their voters to protest the results of the election.
3. Even putting that aside, Joe Biden won the popular vote AND the electoral college, so your point is moot anyway.