/g/ is actually quite useful and friendly, especially the DPT (Daily Programming Thread), more-so if you're a beginner.
/trv/ (travel) is just good and perfectly slow where you won't feel pressure to keep up with a thread because it will still be there tomorrow.
/fit/ has good information and really encapsulates what happens when the internet meets bro-gym culture.
Compared to parts of Reddit, I would honestly take 4chan over it. I mean even some of the formerly "default" sub-Reddits are cesspools of hatred with the occasional call for targeted violence and Moderators who will ban you by association. Some of the big sub-Reddits openly discriminate based on race.
I know journalists have zero motivation to investigate sub-Reddits or the incestous circle of Reddit moderators that control the groupthink in most of the major sub-Reddits, but one day that will come out and it will be an internet scandal. If they time it right it could sink any hope of an IPO or serious monetization.