When looking at this statement made and starting to find concrete evidence that suggests that redbull is bad for you and has health consequences, the answer found goes far beyond redbull specifically. Yes, you are correct on the fact redbull had bad side effects from drinking, but this also includes all types of energy drinks and redbull is included in that study. 
The NIH, which stands for, The National Library of medicine went into great depths explaining this claim and topic, "energy drinks have deleterious effects on a broad spectrum of bodily organs, culminating in mild adversities such as anxiety, gastrointestinal disturbances, dehydration, nervousness, and tachycardia, along with more severe outcomes like rhabdomyolysis, acute kidney injury (AKI), ventricular fibrillation, seizures, acute mania, and stroke. Furthermore, instances linking energy drink consumption to fatalities have been documented."
Adding onto that, the death has been confirmed, and many more to follow. The Center for Science in the Public Interest (CSPI) reported 34 deaths related and linked to energy drinks between the years 2004 and 2011.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10535526/#:~:text=Reports%20underscore%20that%20energy%20drinks,kidney%20injury%20(AKI)%2C%20ventricula