Why office outlook 365 and outlook mail sucks terribly and worst emails in the whole wide world?

There is an awful lot of traffic on a plethora of forums about how slow, unreliable and buggy Outlook is. There are a few things we have to consider, to put this into some perspective:
1. It has been Microsoft's long term objective, for a few years now, to focus on it's cloud based systems. This has manifested itself in the majority of resources going into the development of their MS 365 ecosystem.
2. The desktop, as far as Microsoft is concerned is only a legacy environment. This is why Windows 10 development has has been focussed on only two things. Driving hooks into the MS 365 ecosystem and window dressing, to give them some shiny new things to Wow! about.
3. To the end of both of the above, the Office installable apps have slowly had dev time removed, resulting in the UI, functionality, speed and reliability all declining. Death by a million tiny cuts is what we are witnessing.
Microsoft are shepherding us all towards an always online and always paying existence. This is the new computing paradigm, Microsoft are just doing as they always do and innovating poorly whilst failing to let go of decades of baggage.