About a year after Walgreens Boots Alliance Inc. announced a partnership with blood-testing startup Theranos Inc., the top two leaders of Theranos blasted the drugstore operator as “terrible” and plotted new retail partnerships for their business, according to text messages released in court records Tuesday evening. The texts–made public as part of the criminal fraud trial of Theranos founder Elizabeth Holmes–show frustration by Theranos’s No. 2, Ramesh “Sunny” Balwani, over the Walgreens rela