It's frustrating, I know, there are a lot of negative people about, I've had similar things said to me after it took hubby and me months to renovate our house when we moved in. We were so proud of ourselves but there's always someone who puts a damp squib.
A workmate of mine is very similar.
I did both our jobs for two weeks, when she returned from holiday within 15 minutes she was saying things like 'oh so you didn't get time to do the **** report?' Wanted to scream at her.