Is it normal i feel like i'm incompetent?

Hi,

Sometimes I fail at doing the most trivial everyday activities.

For example, today I was trying to re-align the glass dish in my microwave (you know, the plate that spins around when the microwave is on?). I couldn't align it correctly. All I had to do was fit the dish into the bottom of the microwave, but I couldn't do it and gave up.

Then later in the day I made brownies from a mix. When they were done I noticed there were a few pieces of cooked egg-white, like the kind you see on hard-boiled eggs, on top of the brownie. I don't know what I did wrong when cooking them. Everyone else can make brownies FROM A MIX but not me.

I can't even properly make brownies from a fucking mix...! What is wrong with me? I already have poor self-confidence - these occurrences make me feel even worse.

Am I incompetent or what?

Thanks.