Nice theme! (I really liked how the revealer at 39A39A1991 Alice in Chains track that's a mainstay on rock radio (and a hint to seven squares in this puzzle)[-----------] was both apt and natural, and 45D45DProverb beginning: "If you give ____ fish, you feed him for a day . . . "[---] also especially tickled me for some reason.)
Maybe worth it for the theme and/or cleverness, but strictly speaking, 20A20ACreepy-crawly-themed, wise-cracking Avenger[-------] is not themed on (or created by the effects of) an insect, but an arachnid.