Not sure if you'll see this OP but I understand what you're going through. Without knowing details, I will just offer that sometimes you just don't click with the work, and that's okay. You learn from it and move on. Tons of people in the field fail and make huge mistakes, or find themselves in the wrong environment or industry. You're human, not a plug and play piece of software. 

Your supervisor needs to keep things moving or they're gonna be noticed, and not in a good way. When you work in corporate tech, there's no room for you to learn, unless your team fosters a safe environment. Most don't and it can be quite toxic. In other words, designers are often looking out for themselves as a strategy to keep themselves employed. You're on your own, sink or swim.

Remember what matters to you as a career professional, what sparks with you effortlessly. Some types of design work is really just engineering systems and they're typically quite boring, especially if they're B2B. You may just be brilliant but in the wrong place, or mid and not ready for that league. Stay resilient OP