Everyone is bashing Wallace. Everyone KNOWS Wallace hates Trump. So WTF do you expect? There are a dozen good guys like Mark Levin or Jeannine Pirro who would have been a better moderator.
Trump is the one who blew it... with Wallace running the show. Hell... Why not let Bernie moderate the next debate?
Wallace did ask Biden a couple of tough questions - especially on packing the Court - but he let Biden's non-answers stand without follow-up.
Trump obviously thinks he isn't going to get a fair shake from the MSM no matter who the moderator is - so he has just accepted that debating the moderator is part of the show.