When I watched the last campaign the main message I got was that Clinton is not Trump and a woman and that's good enough to vote for her. I think she could easily have won if she had made a real case to vote for her.
I can't honestly imagine you were either so blind or stupid as to believe that either of those were her main messages. Was your point to say that you slept through the election or that you got all of your political information via Fox news and 4chan? Not sure which, but you certainly weren't actually paying attention in 2016.
Just in case you're serious: Her basic case was a continuation of Obama-era policies: Expansion of access to health care; focus on climate change; level-headed foreign policy; etc.
I think you're right, in a sense. She had a 52-point plan on her website which outlined her position on any number of issues. At heart, she's a policy wonk. Leslie Knope for president. If she had been a bit more simplistic, it would likely have spoken to voters a bit more (ala Bernie Sanders -- Economic fairness! Medicare for all! Free college!)