Not just you. All of us. That’s why I like XG. We all have a perception of how easy a chance is and we have a tendency to overestimate it. Our brain tells us ‘should have finished that’ whilst ignoring how many times we’ve seen similar chances missed.
I remember reading a basic analysis years ago that only one in three one on ones with the keeper resulted in a goal. I found that staggering- I was brought up watching Keith Edwards, I think I saw him miss one. If he got one on one, he scored. I just assumed that was normal. So I started paying more attention when watching other games and realised that apart from players like Edwards and Lineker, strikers did miss one on ones. Quite often. But still pundits would always say ‘he should’ve finished that’.