If, for whatever reason, you decide you've had enough of this place, please be aware that if you delete your account you also delete every post and comment made, which results in entire threads being unavailable to the rest of us. If you intend on this that's your business but I just wanted you all to be clear on what happens. It will render future references to old posts impossible.
Cheers!
I remembered something late last night that may work on your device.
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Click on your username, as before, to bring up the first page of your comment history.
Now, look at the horizontal bar/section up on the top where your username is. Your username is on the right side and on the left there is... Nothing. Click on the left side of that section - almost on the left edge. I have a touchscreen so I just tap on it, but if you have a mouse try clicking and if that doesn't work try double-clicking on it. That will bring up the screen with the search bar and right underneath will be the "ABOUT USERNAME" section that has the post and comment counts and the "Joined" info.
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Good luck... Hope that works for you.