I'll point out that before the news of Galvin going to Bulldogs, Doggies were 9W 1L, and since that news they are 2W 3L including an arse-kicking by Dolphins and a late capitulation to Broncos.
And prior to Galvin announcing he'd leave Tigers, we were 3W 3L; since then we've gone 2W 7L.
Obviously there are multiple factors but there can be no argument that the departure of Galvin coincided of a crash in what had been reasonable Tigers club form, and his arrival at Bulldogs has derailed their form.
Which is of course to be expected, a young half with high pressure and limited experience - you take him out of the side where he trained all offseason and played last year, there's probably not an immediate fix. And then when he is thrust into a roster that leads to the departure of their starting half and hooker, plus shifting their 5/8th to centres, it's not going to be ideal unless they are a long-term proven professional. It will inevitably cause disharmony.
But also, Galvin is a destabilising twat.