Nah. Today, in comparison to 2004, the GOP now dominates state legislatures and control almost all Senate and House delegations (Democrats from rural districts like John Barrow and Rick Boucher are non-existent today). Ditto with governor's mansions. The only strength Democrats have is in the Old South, and even then they are at a disadvantage.
The Deep and Upper South have also swung by monster margins since then compared to Bush's winning margins even though he won them comfortably.
Downballot id say the Peak was 2016 but Presidentially this isnt true. First of all Virginia used to be a solid red state in 2004 now it’s a solid blue state but even other than Virginia your statement isn’t true . Bush won every state of the former confederacy by more than 5 points and all but two by double digits while Trump lost two southern states , won only 7 of 11 by more then 5 points and 6 of 11 by double digits(barely over half).
Even if you do a direct comparison:
Bush 2004 did better than Trump did either time in VA, NC, SC, GA ,MS and TX and better than Trump did in 2020 in AL as well . So Bush did better than Trump did either time in 6 of the 11 southern states