I think my ad blocker doesn't jive with the site, as I can only see the first part that shows the three summary bars in the bar chart. Apologies if I'm missing something.
You also have to keep in mind a few things:
1. Liquidity - how much of this (probably most of federal reserve spending) has gone to maintaining liquidity in the global financial system? That's not going to contribute too much to inflation. If you have the reserve currency, and nobody is willing to lend because they're in fear of going bankrupt or running out of cash while the economies of the globe were shut down, then you wind up having to inject tons of cash into the global economy to keep it liquid. The alternative is armageddon.
2. Low interest rates. When the U.S. government borrows money it pays an interest rate. While the $6 trillion number (or $12 trillion for that matter) may seem very high, it matters how much the U.S. is paying in interest on these loans. Can the U.S. government meet it's debt obligations? Yes? Good to go then. GDP (which sucks anyway) will rise and past debt will be inflated away. Similar to everyone rushing to buy a house, low interest rates are an opportune time for the government to borrow money too. Republicans are hemming and hawing about it, but if Trump was president they'd be doing the same deal.
3. It also matters what ROI you get for spending. Nobody seems to be talking about that. If the government borrows $100 at 0.4% interest or maybe even 0% interest and then turns that into a larger investment in the broad American economy, that's almost surely a good use of money even if it increases the overall debt load if it's actually increasing GDP.
I wish I could find it again, and maybe some enterprising HN reader will have it available, but there was an blog post I found interesting regarding how much the U.S. could borrow. They argued it was probably an unlimited amount of money. If nothing else it's just an interesting take.
We should be sensitive to government spending and actions of the Federal Reserve, but we need to do so smartly. Everyone running around screaming inflation! inflation! are missing the mark. My default in the financial space is when everybody is saying something is true, it's likely not. There's a lot of money to be made convincing lots of people of the truth of something that isn't true and while they're distracted you take lots and lots of profits at the institutional scale (hedge funds, etc.).