How many negative comments are there in all the apps with 100,000,000+ installs?
negative comment refers to Sentiment = 'Negative'; Installs = '100,000,000+';
SELECT COUNT(T2.Sentiment) FROM playstore AS T1 INNER JOIN user_reviews AS T2 ON T1.App = T2.App WHERE T1.Installs = '100,000,000+' AND T2.Sentiment = 'Negative'