Amazing for competitive coding test but needs massive improvement for SQL

I have used Codesignal for giving a lot of Online Assessments during my internship hunt. The coding platform is usually used by a lot of companies for their Software Engineering, Data Science, and Analyst roles. I have come across 2 key versions where it's either proctored or not proctored based on the specific companies requirement. For software engineering roles, the quality of the questions is quite good. Most assessments that I have given have varied from Easy to Medium level questions. Very rarely did I come across a hard question on the test. One particular thing that annoyed me the most was their UI. After each question, I had to go back and choose another question. This made it very difficult to switch between the questions in case I get stuck. The color theme of the editor and compiler was really nice. However, while giving Data Science tests based on SQL, I didn't find the platform to be very intuitive. It lacked a lot of test cases and the compiler didn't highlight the errors properly. The experience for SQL should be much better especially while deploying your custom test cases.