Firstly, I hope my post does not come across as offensive to anyone. That is not my intention. I'm not very good at wording things so feel free to ask for clarification. ^^
I agree completely with what the users above me have said, there is nothing wrong with embracing your sexuality. No one should shame you for it as it is not a choice, just like being gay or another sexuality isn't a choice. While it is good that you are happy with who you are, I can see why
LGBT+ people may feel uncomfortable with the term "straight pride" especially as I have seen homophobes using it as a way to insult the
LGBT+ community, so many people associate the phrase with homophobia even when it is not used in that way, at least that is how I understand it. Maybe it would be best not to say "straight pride" around
LGBT+ people, I can't see why it would be necessary to announce anyway, and I say this as a straight (heteroromantic asexual) person myself. If the subject is brought up, just be clear about what you say to avoid any misunderstandings. For example, this is how I would word it: "I am comfortable with my sexuality and I am not ashamed to admit it, just as you shouldn't be ashamed of your sexuality" or simply "I am straight, but I don't have anything against
LGBT+ people."
Of course, you're not going to please everybody. If people are still criticising you, then they aren't worth your time. Just ignore them and move on.