Honestly, Britney's overall career achievements are not that impressive.
Her sales, besides the first two albums are average (Britney, ITZ, Circus) or tragic (Blackout, FF, BJ),
She only has four #1s (most of them forgagatten today), and all of her "iconic" singles never really charted high (Toxic, Slave...)
Her touring stats are not good considering she only has one + $100M grossing tour.
Spotify and YT stats are also miserable.
Her entire career has been based on her doing some basic hand movements while being half naked and selling sex all the time which is funny considering the only ones who have been buying her music since the Blackout days are gays.