The help function in Excel has been so useless and disruptive to work over more than a decade that I know many people (Excel power users) who just removed the F1 key. It got slightly better with Office 2016 but is nowhere nearly as productive as just googling your problem.
I guess some guy at MS thought: People look online for solutions; We should do that too!
They broke things because the web browser was slow and the search results sucked.
There is potential for improvement. The platform is set for that. But only if someone could go and do the work we would not be talking about this anymore.