This is a all together too familiar feeling that I got over pretty quick a few years into the biz.
It is important to not take this stuff personally, and just because I typed it this sentence easily, it is not an easy thing to accomplish of not taking these "attacks" ( I use the word "attacks" because that is what they felt like to me in the moment, they can feel different to you, but I took them as personal attacks)
It is important to take a step back and give a good attempt into understanding the whole process and appreciating who and why, everyone that is involved and why they are involved.
You and the homeowner are involved because they needed your services and you rendered said services in full and all the correct way.
If you completed your job correctly and to the certification standards of your industry, then you took pictures and took readings daily-adjusting equipment/adding or removing certain pieces as areas dried.
We document all of these moisture readings not because they are fun to take and write down, we do these as this is what the standard asks of us and is what we will stand on if this job ever is questioned for liability purposes in a court or to justify any charges and why, what was done, when it was done.
All a part of dotting your I's and crossing your T's. Having all of your ducks in a row and what not. I could keep going but will refrain.