How would deal with this

Do you think a manager / boss emailing you saying "this is the second time I've had to remind you" is a little patronising and like speaking to a child?

I should provide context - basically, my boss is extremely impatient (by his own admission) and barely tolerates mistakes. So he's someone who just doesn't understand that once he's told you to do something, it's simply unacceptable to make a mistake. This is reference to two tasks that I simply forgot to do once. Wasn't deliberate obviously, I just forgot as I was busy doing other things as well. I can understand him writing like this after the 7/8th time or you're making the same mistake like every week! I think anyone would be justified in getting annoyed then, but this is literally just being reminded twice.

To add further context, none of these two tasks are particularly important or vital - uploading a few documents onto a CRM which can be done anytime and then the other, was using the correct slide format version and I simply forgot to use the right one. Furthermore, these are new tasks in my role, I haven't done them before so it's also simply getting into the habit of doing something different. He can't seem to understand that being the perfectionist he is.

So yeah, in the grand scheme of things not exactly earth shattering but he reacts like you've insulted his mother.

To his credit he can be complimentary of me at the same time and does acknowledge the good work I've done at times but he's far more animated and outspoken whenever I make even the most minor mistake. I've been wanting to leave this job for a long time now as I can't keep being treated like a child and also to work with someone who is constantly micro managing, stressing out over every mistake, sees his job as the be all and end all.