Thank you for your feedback. I am very sorry you had a bad experience.
The winter season (and closed doors, lack of terrace seating) sometimes do make the café interior more full and stuffy. We will strive to keep noise levels down (including by music selection and the noise we make while we prepare drinks). It is also highly dependent on the part of day - while weekday mornings can give the classic pleasant café vibes, some weekend afternoons are more challenging due to heavy demand.
As for the air quality, we plan to finally execute an air circulation system in 2019, the planning is in it's finishing phases.
Thank you for letting us know about your experience, and helping us improve.