If I were Madi and came across this googling the show, I would say thank you for the nice comments about the hair. You can't even see the baby sick.
Secondly, I would remind people that the show has a crew to cut and edit the footage. This allows them to take comments out of context. If I were Madi, I would know Pete very well (obviously) and would clarify that any negative comments were made due to the trying circumstances.
Also, I wonder if anybody would feel differently (again, if I were Madi) if they knew that they were hours late to film that meal and the day after the meal she would be boarding an early train to visit family with Finn (which cast and crew knew).
As for babysitters during...good luck with that for a 4 month exclusively breastfed baby and no relatives in the immediate vicinity. Why should Finn have to have a babysitter so his parents can celebrate the birthday of a girl they barely knew at the time? Maybe they were pushed into situations instead of being able to enjoy their new son and parenthood.
The show could have been outlined as a more positive informative show, hence participation. Upon the realisation that it was something entirely different, there may be understandable frustrations.
If I were Madi, I would urge people to take the show with a pinch of salt and remind them that contributors may see their comments.
This is only if I were Madi, of course...