I dont see anyone attacking. In fact, being supportive if anything.

I agree that it was a nice gesture. But I do think it was inappropriate gesture at work. She made it clear she wanted to end the relationship. They work in the same office and he is her boss / superior. It could be construed by her as unwanted attention. Making things in the workplace uncomfortable ... as if it isnt already uncomfortable enough. And could create legal issues.

If OP wanted to reach out and offer a beautiful bouquet of flowers to the woman he loves, it just would have been better to make the gesture outside of work. Keep personal stuff personal.

Kind regards.