I will never be sorry when I get frustrated when another character is put forth/confirmed as straight when they could easily have been made queer. If that frustration is off-putting to you that is your problem and you need to deal with it. It is not like you don’t get exposed to multitudes of characters and relationships that are similar to you/yours at EVERY POINT OF YOUR LIFE. You got to see relationships and people that looked like you when you were young in media that was meant for you.
I didn’t realize I was queer until I was 15 and huge reason why I realized it then was because I got see stuff like Haruka and Michiru and Willow and Tara and have everything click that yes, my liking girls and not feeling attraction to boys was a thing that did exist in people outside of me. It isn’t hard for me to hazard that a lot of the confusion that I felt leading up to that could have been saved had I seen representations of queer people in stuff like Disney and Don Bluth films that I watched when I grew up. So just think about that.
If it really bothers you that people read characters (particularly young characters) as queer but not when people read characters as straight you should re-evaluate your thoughts and ask yourself just why that bothers you, and why you have to try and make queer people feel guilty for fully valid frustration with extent that heteronormativity is pushed in everything everywhere along with the complete dearth of representation of queer people in everything.
That is something you should feel uncomfortable about.