Fallout 4 has over 4x the players than Starfield does at this moment, and 3x more players over the past 24 hours. a 10 year old game from the same company, beating it consistently for player count, by magnitudes is probably a good indicator that Starfield isnt popular.

Starfield https://steamdb.info/app/1716740/charts/

Fallout 4 https://steamdb.info/app/377160/charts/

A game called Amarillo's Butt Slaper, has over double Starfields player count currently. Thats definitely bad knews for Starfields supposed popularity.