I don't think you have anything to be sorry for. You should be mindful of what you publicly say about your employer but being enthusiastic (if a bit uncritically) about your workplace is part of the point of interning. It's a lot less weird than someone making an account just to berate you about it.

I mostly regret the comment on F#. It's not my place to say and it makes it seem like I know more than I actually do.

The F# comment was the only thing I think that was out of place. It posed a definite non public position on a product.

But you clarified it after the fact so minimized any damage.

Microsoft will likely not care about it, but it is the kind of thing to be mindful of.

Most of the big tech companies will have some kind of training explicitly calling out off the cuff comments and how to be mindful of them.