Did you manage to sell your account in the end? -> Nope, still have the account as a sort of trophy / reminder.

Do you intend to seek professional help about your addiction? -> Yes, scheduled something last month. But as I mentioned, the game slowly lost its appeal.

> it definitely seems this did not happen as a result of some addictive quality of the game, rather your own personality/current situation.

Putting blame the victim is always the easiest way to go. Good job.