I thought about switching from Construction to Structural (I don't know what I was thinking - but that's for another thread), but I took the advice of some folks here and stuck with Construction. I'm glad I did. When you're discouraged and the wound of seeing that red rectangle is still fresh, you want to run. Don't. You know what the problems look like. You are probably familiar with a couple of your resources or references. Now, you just need to tweak your approach and get to work. If you didn't take a course before, I recommend that you take a review course. I took EET. I also sat for the Construction PE twice. I thought that studying the material would feel like I'm starting over, but that's not true. Like I said, you've seen it before. Wait until you can look at it with fresh eyes and get some guidance or instruction. ALSO, get your hands on as many DIFFERENT kinds of practice problems as possible. EET's problems are instrumental in helping you to understand the topic, but you still need some variety in the way problems are worded, and variety in the different kinds of problems (look up and interpretation of references, problem solving strategies and different ways to use formulas).
Change the way you study. You will succeed. If you switch, you will be starting over. Also, I have the NCEES Transportation Practice Exam. It is NOTHING like the 3 geometrics problems we get in the breadth section. Don't kid yourself.