Re: "What we got back, didn't live long.....Fortunately."
A number of unpredictable things can happen when someone removes the part of the transporter responsible for scanning what's there and neglects to tell the transporter chief not to use the transporter while it's removed.
The TMP crew was among the most incompetent in Starfleet.
I think it's kind of amusing that Kirk was in command of the Enterprise for not even one minute before the first two crewmembers died -- the transporter failed almost on cue.
"You have been examined. Your ship must be destroyed. We make assumption you have a deity, or deities, or some such beliefs which comfort you. We therefore grant you ten Earth time periods known as minutes to make preparations."