This is really incredible. You are on one end of the spectrum by being hardworking and motivated, while I on the other end of the spectrum by being lazy and unm

This is really incredible. You are on one end of the spectrum by being hardworking and motivated, while I on the other end of the spectrum by being lazy and unmotivated. While both being misjudged. I started last year, and since then I was constantly late to work, left home early, and always complained about design, tasks and so on. Took ages to understand code written by others and just thought it's over-engineered when it's clearly just my lack of skill. Moreover, the deadline and planned launch is delayed too; I firmly believe this is my fault. Yet, my boss thinks I worked really hard, and the delay is not related to me. I told him this is not the case but he says just work hard this year while giving me a good performance review. I'm completely blown and with the shame and guilt I'm feeling, the way I proceed is to work hard and actually contribute to the project. If I was in your case, I would tell them the truth of which you did work hard with so much care. I'm afraid if you don't do this immediately it would end up as a trauma and will stay in your head for a long time.