Castle no longer castle

Sab has lost the skill to brew good beer,I am a beer drinker although I work work a company that produces ciders ,so I know what to look for in brewing qaulity and my personal opinion is that I think that the co2 that they use is creating a off taste in their beers since co2 is my level of experties if not the co2 than the brewing of beer is becoming a complete mess. I drink castle lager and the off taste nowadays is becoming unbarable to a point where I will have to change brands, because what I am drinking might be toxic to my body when it comes to the co2 used in the beer Sab is using.