Depends, if u were expecting a reply and they leave u on seen its fucked up, bt if there nothing to answer its alright

Yes

Yeah it's intimidating but it's their choice so i respect that

No. Nor should anybody. You gotta respect the other persons choice.

If I am expecting an answer or if I really want that person to talk to me, or if I am in r/ship with that person, well, yes, that's intimidating. But not like from my friends or siblings ...

Not intimidated but like annoyed like for real. I think people leave you on seen when they don't care about you that much.