Why is it taking so long to broaden and deepen the Port of Gothenburg?

World's largest cargo ships run half-full to and from Gothenburg

For years now, many of us have been saying that the Port of Gothenburg needs to be made deeper and wider so that the biggest cargo ships don't have to go come and go with half as much cargo as they can actually carry. In 2018, the government announced their decision and budget to deepen the port, but so far, nothing has happened.
It is now up to the land and environmental courts to approve the project. If they do, the project can apparently be completed by 2026.
Does it really have to take that long?

Efficiency and a greater respect for the environment are driving the trend towards even larger ships. It is not difficult to understand that it's cheaper to load a large ship than a small one. That's why more and more shipping companies are investing in building huge ships, and ports need to keep up and develop at the same pace in order to be able to handle cargo in the best possible way.

One incident that clearly shows what can happen to these large ships in shallow ports and passages is the case of the Ever Given – the ship that got stuck in the Suez Canal a while ago. It was quite the ordeal. The whole of world trade was affected, which is not surprising given that each day, roughly 50 ships transport about 10 billion USD worth of goods through this particular passage.

At present, there are about 80 ships that are roughly the size of the Ever Given and another 60 are under construction right now. Fully loaded, they weigh over 200,000 tonnes!
These ships can carry more than 20,000 containers (20-foot). In this context, it's easy to understand the data from the Bloomberg News, which claims that the container capacity of the world's ships has doubled these last ten years.

These are the ships that operate on the Europe-Asia route, loading consumer goods and intermediate goods in China and Singapore and then heading for Europe via the Suez Canal after passing through India. Here in northern Europe, they dock at ports such as Antwerp, Hamburg, Rotterdam and Gothenburg.

It's fortunate that Gothenburg is the last port on this route, as it is the only port that these ships cannot call at with a full load. They have to come half full, which means that Sweden cannot accommodate a fully loaded modern cargo ship.
And apparently, we won't be able to do so until 2026.

Once in Gothenburg, traditional Swedish exports such as wood, paper, machinery and other engineering products are loaded onto the ship. But like I said, they can only be loaded half-full in Sweden's and the Nordic countries' largest container ports.

The ships will thus be larger, more modern and more efficient, requiring huge investments, while the Port of Gothenburg will at best be able to accommodate them and load them full in five years' time. 

Can't they speed up the process?