Welcome.

'Anosognosia' or the inability to recognise one's own deficits and symptoms is a common effect of head injury, one which many of us suffer(ed) from, and which has led many of us to do 'stupid' things which exacerbated our injury.

It's good that you seem to have recovered much of your insight and are now able to make good decisions. The brain is usually better able to recover than you might think, though it often takes a long time. But don't beat yourself up about having done 'stupid' things, your lack of self-awareness was probably just another symptom of your injury.

Best wishes.