Yeah the structural damage to Galactica became a major plot point in the last season.
Also worth remembering, as a carrier it was only semi-functional from the very start, ie only one landing bay was operating.
See, the premise included a bit about how they could never have any support at all. They'd NEED support to keep the ship running. So they shot themselves in the foot because if they'd sustained the damage from "Year of Hell" they'd never be able to fix it and the show would be over.
I don't know if this is meant to be arguing with me or what?. I'm only discussing how I would do a show like this differently, and I've never said that a lack of federation support means never getting any repair work done.