I mean, I usually see much more advice than just that!
There's a general round of practical advice that's always given, every time these questions are asked. Inevitably a few people will point out that stats aren't a reliable measure if you've been going for a year or less and you can't really draw conclusions from them -- because a lot of creators genuinely don't realise that -- but the one time I saw a thread where someone HAD been at it for a full year with little growth, several people in the thread took it very seriously and looked at his update patterns and engagement to find out if there was anything he could do differently.
In my experience, it's been the norm for folks in these threads to look and see if there's any obvious things that can be done to help. They'll take a look at how often you've updated, if there are glaring easy fixes like font readability or updates that are a weird size or too many pages in one episode. They'll ask if you have social media, or any other internet presence, and if you're participating on Tapas and in any communities outside Tapas. We've had a few times where someone with good work was frustrated with a lack of engagement and we discovered that they were editing new pages into an existing episode rather than starting a new episode. There's a decent amount of investigative work that happens in these threads!
But I agree with keii4ii's first post, that if you want critique on your comic, you have to actually ask for critique on your comic -- both because unsolicited critique is sort of presumptuous for someone to give, and because a thoughtful crit is a lot of work that you can't expect of creators who don't even know if it's wanted.
When folks ask "what could I be doing better, is my comic turning away readers?" they often get specific answers. And we often suggest making that sort of thread or asking those sorts of questions when someone expresses that they want to improve their comic.
When someone actually gets nothing but "it's normal for stats to be low when you're starting, just keep going," that usually means that there's nothing else glaring that we can see that's hampering them, the number of subs they have doesn't seem distressingly small, and it's literally just a matter of hanging in there until they find more of their audience.
I don't quite agree with this. I think the truth of the matter is that both kinds of advice are needed -- some creators won't benefit from a List Of Things To Try, they need to hear that they're not behind, that they're not doing anything wrong, that it's normal for this to take time; while other creators don't benefit from this sort of approach and need to be pointed in a direction. We need both!
I also don't think "if you're doing a niche story, your audience is going to be smaller" is cliched or philosophical -- it's practical and honest. A creator might WANT to hear something else -- they might want to hear that there's something they can do, some trick they can learn, some alternative advertising method that they just haven't found yet -- but sometimes, there isn't. It's just "try everything and find out what works for you, specifically," which is the advice for any content creator, really, with an additional "but you're basically playing on hard mode so don't get discouraged."