I'm listening to the market the thousands of users that interact with at my company (and previous companies that I've worked for) and my 20 plus years of IT administration experience as well as people that I tend conferences and meetups and other places with so I have plenty of reference points to draw from
While there are weaknesses for sure and there are many many problems with the office 365 platform as a whole I think your statements are a huge exaggeration
Of all of the online office suites out there when you compare it to say Zoho or Google or even libre office
The feature set when it comes to using it in an enterprise setting Microsoft hands down is the best option
I suspect that you are limited in your your scope of inquiry probably to an open source and probably to a technology heavy user base not a generalized business user/consumer user base
If you went into I would say probably at least 80% of the companies in the US and told the accounting department that you're taking away Excel and giving them Google sheets instead they would scream bloody murder
Office 365 is garbage. We had to ban people opening documents in share point through the web because absolutely destroyed the formatting of templated documents.
Office 365 is more than just the web versions of the office components so stating that the entire platform is garbage because you have a specific issue with a specific feature of a specific part of the platform is ridiculous
The web versions of the office applications are the weakest due the nature of browser-based applications that does not however prove the OP comment that the entire platform is "garbage"
If you think that, you aren’t listening.