Think back to the cases you have followed here. I would say the majority of families might not like the way an investigation is handled.
LE operates solely on facts, they have legal protocols to follow, and most of what they do takes time. Warrants take time, cell phone records take time, DNA takes time, following up on tips takes time. To protect the investigation, & ultimately a potential prosecution, they do not share information with families or the public.
Families of the missing are highly emotional and just want their loved one back stat. They are going through the worst experience of their life. As a poster here, I'm impatient and want to see visible results and I don't even know their loved one, can't imagine how they must feel. IMO, the family has enough information to know that Suzanne is in grave danger. Every minute that passes without finding her is hard for them. Desperation makes them want to take matters into their hands, as they feel not enough is being done. Truth be told, behind the scenes LE may be making substantial progress. Look at the Gannon Stauch case. We physically saw the searches, knew they were looking for evidence but had no idea how far the investigation had progressed at that time.
TN is doing a great job for his Aunt Suzanne, he's getting the word out there and it's working. The case has went national.
