[6] 21st Century Love Songs was officially announced in April 2021, with Ginger describing the upcoming album as "Sarcastic, fun, angry, proud, experimental and belligerent, all wrapped up in a big 'fuck you'" and comparing it stylistically to 1995's P.H.U.Q.

[7] "Remember These Days" was released as the first single from the album on 18 June, the lyrical content of which Ginger explained "harkens back to a more innocent time when being in a band, and simply making music, was enough".

[8] The next month, "Sort Your Fucking Shit Out" was issued as the second single, which Ginger noted was about "giving yourself a bollocking ... [for] habits or irritating behavioural patterns that we know we ought to quit".

[9] The third and final single from 21st Century Love Songs was "Sleepaway", released in August 2021 alongside the first official music video from the album, which Fraser Lewry of Classic Rock magazine described as "more than a little bit gruesome".

"[3] He described the album as a mix of the "absolute disregard for convention" on 1994's Fishing for Luckies and the "heavily hooked songwriting" of 1995's P.H.U.Q.

[3] Classic Rock writer Johnny Sharp awarded the album 4.5 stars, praising the range of musical styles displayed and suggesting that "for the most part it makes every other record released this year sound like hopelessly anodyne easy listening in comparison".

On 23 April 2022, the Wildhearts released the four bonus tracks from 21st Century Love Songs on 10" vinyl under the title AD/HD Rock as part of Record Store Day.