Fun fact: the US isn't even in the top 30 for debt as a % of GDP.
It's standard for debt whiners - they complain about the absolute value without actually putting it relative to anything (numbers alone are meaningless unless they're anchored to something. % of GDP is a good one. $ per capita is a good one. Absolute value is not a good one.) And none of them can ever explain why the debt will hurt us. In general, they complain about things like China owning us (without understanding how much China owns and why it isn't really a pressing concern.)
No one will say our debt is good. No one will say we shouldn't make broad moves to stem it from growing. But it isn't our most pressing concern. That debt has next to no impact on our domestic economy. That debt doesn't contribute to our country being a crappier place to live. Let's focus on things that do.