Actually (and it's a guess, since I wasn't there) your speed was probably Ok (quick, but in terms of ok to make it around the corner).
Your lines however... well, were basically non-existent, constantly on the other side of the road, for really, no reason. It's not a dig, see it as education. The idea of going out there is to enjoy the corners, not make them all straight
Entering that particular corner, you were much too close to the centre line (as a result of trying to cut corners) which made that corner tighter than it needed to be. If you had been further to the left, and using a late apex, it would have been safer (for you and other vehicles) and you would have been far more likely to make it around the corner. As you say, fixating didn't help either.
Honestly, you're riding at speeds well in excess of your skill, ergo, something goes wrong, and you can't correct it, hence why you always ride with plenty in reserve to handle the "what if" moments.
Spend more time learning to ride (skills development etc) and less time trying to look and go fast. Speed will come naturally, as your skills progress.
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