Hi!
Unfortunately, the game gets really boring after three hours. There's practically nothing to do. I played against four enemy factions. They didn't even try to bring me to my knees. Occasionally, one faction would nip at me. And that's it! After three hours, 90% of all the technologies were researched. I had built up a maximum fleet. I just had to methodically capture the remaining planets. This problem is most common on maps with a large number of opposing factions. They're fighting, but for some reason they're afraid to touch me. New technologies could be added, but the game already has about 600 technologies that you're planning to optimize. Most likely, the game is still poorly balanced in various aspects. Something needs to be done about this. New game mechanics and new victory conditions could improve the situation.
I'm playing on Nightmare difficulty. Why do I get bored after three hours? Because I know my fleet, consisting only of capital ships, command ships, and a titan, is unstoppable. Therefore, I recommended redistributing the fleet's supply points accordingly. Either they should be divided equally between light and heavy ships, or the AI fleet should be designed accordingly at different difficulty levels. Let's say at the highest difficulty level, the AI fleet should be 90% capital and command ships. But the first approach is better.