Honestly, it's kind of normal to launch in relative obscurity, take maybe half a year of regular updates to get to a point where you're starting to see a few regular commenters -- and for some folks that level of regular engagement doesn't come until a year or two. That is the norm.
There's plenty of comics who did get a lot of attention right off the bat, but that's sort of like watching American Idol as an example of what a career in music is like.
Webcomics honestly start out sort of thankless! I think it's okay to look at that and go "whoof, that's not worth it for me" or even just to look at it and go "okay, I need a break to figure out how I'm gonna approach this next time or if I want to go in a different direction." Stepping back for a sec to do a postmortem on whether there's anything you could've done differently, or if you did everything you could and it's just a matter of "keep going," like pushing through the first round of rejection letters, makes a lot of sense!!
Seconding this point!! Even taking out the stuff about the Fresh section and website algorithms, this is true out on the wider internet, too. Posting regularly means people have more chances to encounter your work, as each individual update has a chance to generate interest.
If you update all at once, and nobody happens to be looking when you do, then that's it. You're not likely to be noticed. But each update is a new chance for people to interact with your work, a new chance for you to advertise in whatever social media circles you advertise in, etc. Uploading everything in one big chunk only really works if you already have an audience.