Carragher spoke on Sky Sports after Salah posted a lengthy statement on social media following Liverpool's 4-2 defeat at Aston Villa, in which the departing forward called on the club to return to the "heavy metal attacking football" associated with Jürgen Klopp's era — widely interpreted as a public criticism of Arne Slot.
Carragher said he had anticipated some kind of intervention from Salah before the end of the season.
"I'm not surprised. I told everybody, 'something else will come before the end of the season. He'll drop another bomb a little bit like Ronaldo did on the way out of Manchester United'. I thought it may come after the end of the season when he'd moved on, but no."
He was pointed about the timing and what he sees as the motivation behind the post.
"Less than two years ago, I called him selfish for doing an interview and I think that rings true again. Liverpool have a really important week. They are still not fully qualified for the Champions League and it should be about Liverpool FC, not Salah FC. It's vital that Liverpool make the Champions League positions, but I'm not surprised and it's not a good look at all."
Liverpool sit fifth with one match remaining, needing a positive result against Brentford at Anfield on Sunday to guarantee a top-five finish. The 33-year-old, who has scored 12 goals in 40 appearances this season after netting 29 league goals in last season's title-winning campaign, is leaving the club as a free agent this summer after nine years.
Salah's post was liked by several Liverpool first-team players, including Dominik Szoboszlai, Andy Robertson and Curtis Jones.