1. Congested User Interface Users frequently complain about Power BI's crowded and bulky user interface. It is in the sense that there are numerous option icons that obscure the view of the dashboard or report. Most users would prefer a clearer user interface or report canvas with fewer icons and options. Creating scrolling dashboards is also a built-in feature.

2. Stiff Formulas DAX is the expression language used in Power BI to deal with data. Although the DAX formula in Power BI can perform a variety of tasks, it is not the easiest language to work with. Sometimes your formulas work well in Power BI, and sometimes they don't. Concatenation is possible up to two elements but concatenating more than two elements needs nesting statements.