To be fair, more excerpts from his interview paint a more optimistic picture (from Giolito's pov).
"For me, I really was sold on the Red Sox philosophy, talking with (manager Alex Cora), talking with (pitching coach) Andrew Bailey, talking with (chief baseball officer) Craig (Breslow). That initial meeting really got me excited. A lot of my free agency process was tailored to working towards getting something done here.”
Sox apparently reached out to him early: “That obviously meant a lot to me,” he said. “It’s my first time going through free agency. Obviously, there’s a lot of unknown coming off of last season. We had a really interesting, amazing Zoom call, like a pitch meeting, where I got to get a feel for the organization, got to meet some of the staff and I really liked everything I heard.”
More on his feel for the organization: “Because I’m coming off a down season and the year before that was a down season too, for me, committing to a big long-term deal at a value that I don’t necessarily see myself at or not really having interest from teams in that type of deal, it didn’t really make sense,” Giolito said. “What makes sense for me is going somewhere where I know I’m going to be comfortable and I know I’m going to get better.”
https://www.masslive.com/redsox/2024/01/why-lucas-giolito-chose-1-year-red-sox-deal-after-market-wasnt-crazy-for-him.html
In a surprise to nobody, the context of the interview is a heck of a lot different than a headline and a tweet convey.