Reading for anyone else interested in what this Ewan MacKenna fella is leaving out:
https://theglobepost.com/2017/11/21/qatar-saudi-arabia-blockade-game/
https://theglobepost.com/2019/06/17/qatar-crisis-gcc/
https://en.wikipedia.org/wiki/2017–19_Qatar_diplomatic_crisis
So from the UAE side, Saudi Arabia aren't great to be linked to, I can already gather that.
But for balance, from what I can see, important points that are always left out form people like him are:
Iran are no angels, accused of state sponsored terrorism for a start(imagine the stories that would be written if City were on that side of things?) that's a good thing to lead with when a dipper is claiming "Iran aren't that bad compared to the UAE la".
Saudi Arabia don't have good relations with Iran(probably doesn't need to be said), especially after an attack on their embassy in Iran(Tehran) in 2016, other issues add to it such as the interpretations of Islam, aspirations for leadership of the Islamic world, oil export policy and relations with the United States and other Western countries.
Qatar have had close relations with Iran for a long time, they share one of the largest natural gas fields in the world, so it would be mutually beneficial if they did.
Qatar paid $700 million to Iranian-backed Shi'a militias in Iraq, in 2017. Which angered both Saudi Arabia and the UAE.
Saudi Arabia were becoming anxious about the Iranian presence in Yemen, Syria and Lebanon. They demanded Qatar reduce its relations with Iran, to reduce its growing influence in the region.
The blockade itself includes the airspaces of the UAE, Saudi Arabia, Bahrain, and Egypt.