Unfortunately the young women that work here have little patience for customers and lack the care and ability to give adequate customer service.
Simple requests upset them and cause them to become frustrated in front of customers. They are clearly very young and immature as they intentionally remake food incorrectly when asked to correct it after doing so the first time.
Their manager is likely disappointed in them already, seeing as they work the closing shift every night.
Dear Taco Bell manager, your employees are unpleasant and have poor judgement and self control.