By 'complicated' in point 1, do you mean 'large'? Because a complex algorithm should be fine -- heck, it should be better in something like Python because it's relatively easy to write, so you have an easier time thinking about what you're doing, avoid making a mistake that would lead to an O(n³) runtime instead of the one you were going for, takes less development time, etc.

I assume you meant 'large' because, as software like Wordpress beautifully demonstrates, you can have the simplest program (from a user's perspective) in the fastest language but by using a billion function calls for the default page in a default installation, you can make anything slow. Using a slow language for large software, if that's what you meant to avoid then I agree.

And as another note, point number 2 basically excludes all meaningful software. Not that I necessarily disagree, but it's a bit on the heavy-handed side.