People had a knee-jerk reaction to your question because there were lot of conservative snowflakes at the time complaining that they added “woke” politics to the show (a ridiculous idea, but I probably don’t need to tell you that).

Fans of the show were on edge and defensive, don’t let the “culture war” ruin your experience. I highly recommend watching the series.

And, to answer your question earnestly, in the game Bill and Frank’s relationship was only implied in a note that Frank left to Bill after killing himself. The show focused heavily on their relationship and took it in the opposite direction; a decision most fans loved, because it was done really well. In the game, Bill rejected Frank’s attempts to let other people into their life and drove him away, while in the show Bill slowly opened up and lived a long happy life with Frank despite the apocalypse.