Yes, I is intersex.

There are a few variants that add or replace various letters; sometimes it’s a personal preference, sometimes it’s an age thing, sometimes it’s a deliberate exclusion.

The generally accepted ‘catch-all’ is LGBTQIA+, but ultimately it comes down to the individual. One person can never speak for such a broad community.

Whether you consider queer a slur or not is also a personal matter. Anecdotally, I see a lot of people happy to use it to self-identify, but it does have a hurtful history that others can’t separate it from.