So, that's what's wrong with my tea.  I was making it way too strong.  Thanks for the tip, UT.

I finally figured it out.  I've been putting WAY too much tea leaves in my cuppa.  I used to put like a heaping teaspoon (like the dinner teaspoon, not the measuring spoon).  Now, I finally scaled back to just a little bump in the bottom of the teaspoon and it's great.