Tensorflow losing has nothing to do with Google getting bored -- it's vice versa.

Tensorflow is a symbolic framework, which is less intuitive to work with for most people than the Pytorch. Not to mention the errors Tensorflow generates are more annoying to debug (again more an issue with the fact that it's symbolic than any lack of effort on part of Google)

Google tried to fix it by introducing an eager mode in Tensorflow but by then it was too late.