UI is cluttered, wireframe-like, and does not orient user attention appropriately
There is simply too much going on on screen that is given the exact same visual weight.
You need to use more colors in the color scheme, use icons that are more individually unique. You also need to define some different regions using more noticeable background colors. Serif fonts also introduce a complication in designing for articulate use of space, because it conflicts with block design.
All in all, the website design does not help orient user attention to the overall mental model of the features: the features are not prioritized and nested very well. You need to reduce how many unrelated details are showing at the same time. Some of the tips above will help contextualize details to let the user separate their thoughts, but reducing details can also help.
Loosely speaking, you need to arrange your interface with bigger ideas to the left of smaller ideas, and bigger ideas above smaller ideas. As you can see in the attached screenshot, this is almost what you do, but you violate this principle by putting a large category "Data Services" to the right of the project name, separating it from its content underneath. That "Data Services" thing behaves like a tab. It should not be presented in a "breadcrumb"-like view next to the project name. It is not a file address or URL. Use conventional UI metaphors that work. Stop trying to follow the trends of disjointed UI arrangements. They only work when there is very little information on screen.
