Mistakes happen, I don't blame you, but two years is still a lot. You host this site for free of charge, so I don't think anyone else here will blame you either. In fact, this incident has probably affected you a lot more than anyone else here. Regardless, several help topics have been lost. I couldn't find any mirrored posts on archive.org either, so it would seem that this information has been lost for good.
No need to apologize further though, the best thing you can do for now onwards is to make sure that frequent backups are made and that multiple versions are stored, so something like this is a lot less likely to happen again. What matters is not so much that you made a critical error, but that you learn from the error and are willing to make the appropriate adjustments in response to it. Even though this data loss will probably lead to a hit in the morale on this site, this domain is still a popular hub for developers and as such will still be sought out for by people in need of assistance.
Although, I would recommend that you change your signature to something less profane, not a complaint, just a suggestion.