I'm my own worst critic; I hated that I sometimes could hear audio echos when I edited my commentary. I move just a bit to one side, it changes my vocal volume drastically along with the recurrence of echos.

I personally bought myself an Auray Iso-Armor 2. It's admittedly a clunky thing, but it works if you just can't sound-treat your home. I have it sitting on an old delivery box with a hole cut on top so it can sit evenly without the mic handle getting in the way.

It works well enough to isolate your vocals and cut on the echoing; just make sure it's placed close to you in direct or close to direct line of your voice for full effect.