Er . . . no, that's not quite it.
The author is listing, factually, the events that have occurred and the software changes that have resulted from them.
So, while he may well not like the new client, it's not just some personal vindictiveness but the result of changes for the worse in the software - changes he has detail in the article. If you think that the removal of 'tasks' and the lack of a calendar sync option is not objectively a step backwards then perhaps you've never used these functions.
When a normal, expected feature that works well and is commonly used gets axed, it's hard to put criticisms of that move down to personal dislike.