What is the meaning of " bless their little pea-pickin' hearts but TMW has done it again"? [closed]

What does this sentence mean, especially the usage of 'but'?

• Well, bless their little pea-pickin' hearts but TMW has done it again.

Also what does TMW mean?

"Bless your little pea-pickin' heart" was a catch phrase coined by Tennessee Ernie Ford, a country singer and entertainer, in the middle of the last century.

[Ford] earned the nickname "The Ol' Pea-Picker" due to his catchphrase, "Bless your pea-pickin' heart!" He began using the term during his disc jockey days on KXLA.
_Wikipedia

The term is one of mild condescension, a countrified variation of "Bless your heart," which was used more in Southern and rural US localities and in earlier times. "Pea-pickin'" is probably a slightly sweetened variation of "cotton-pickin'", which was a kind of minced oath in that era (i.e., a substitute for a word like "goddamn").