I have made that mistake myself, often. Especially in explaining/telling too much. I knew it when I was a new writer, but it took years to figure out how to fix it. My issue, it turns out, was fear that I would leave something out that I forgot to explain later and/or confusing readers. Of course, that is easily fixed by beta readers and critters, which I didn't know about years ago.
At the moment, I'm working on a new issue: how to make a book self-sustaining within a series.
There's always something to work on, huh?
And about social conflicts I entirely agree. They're needed, but they suck to write. I like everyone to be happy, and all my characters (except the main antagonist), to be nice and happy... but that doesn't usually make for a very good story.