I made a similar pledge to myself - I just can't face the disappointment of a visit, nor the pall of depression that such a visit would inevitably engender. Reading your comments, I think I will stick to that pledge, for a year or two more at least....
I understand your own and Pipaluk's stance completely. During it's "darkest days" I avoided visiting Twycross for the best part of the year and it's only half an hour away! I just got fed up visiting and coming home frustrated and disappointed with the feeling that everything was moving in the wrong direction with no u-turn in sight.
Thankfully things reversed (eventually) and I hope Marwell also turns round in due course.