nsdwight has the gist of it. As the sub grows, we attract a larger audience, an audience that, unfortunately, contains more people who don't know the rules and don't bother to read them. We do our best to filter vague and low-effort questions, but can't catch all of them. If you see them, report them! Everyone can contribute.

Unless you're talking about submissions that are not being removed- if that's the case, care to provide examples?

I just hit report when I see these types of questions on this subreddit. It usually gets taken down within 15 minutes after that. If it's been up for a while, I send a moderation message to make sure the report gets seen (partially because "ignore reports" is a thing and partially because it's pretty difficult to accidentally miss an orange-red message indicator).

Also, yes, it's likely just growing pains. People often don't read the rules thoroughly before posting. That's why moderators are here.

You're becoming more popular. The more casual people that join the group, the more superficial questions it receives.