This.
I know my dogs. I've owned dogs all of my life. I've worked professionally with dogs. If my dogs are stressed, I know about it, and I act.
Of the 5 I have now, 1 enjoys people watching. 1 is just happy to be with you, no matter where you are or what you're doing; if she's with you, she is happy, and 1 is just a really chilled dog who takes everything in her stride, whilst simulatenously being a massive drama queen who is frequently rushed to the vets on the brink of death only for us to learn she's stubbed her toe.
Of the two problematic ones, I did initially think the demonic entity had fear aggression, and I still believe this is how it started; however, it is now an attention-seeking behaviour. He knows if he starts behaving like a rabid Hellbeast, someone will pick him up and cuddle him to calm him. It is something we're working on.
The anxious one is anxious no matter where he is, and it's not healthy for him or me to spend 24/7 hiding under my duvet while DD2 brings us food, as much as we both like it to be, so we're working to find the right balance of medication to keep him sedate enough to manage his anxiety but alert enough to learn. In the meantime, it really is a case of deciding where he will be the least anxious, which is usually with me, wherever that may be.
Off topic but PSA: if a cute, fluffy puppy is returned to a breeder 4 times in 6 months and then offered to you for free, it is for a reason, and that reason is that it is not a puppy; it is a demonically possessed beast sent from the deepest corners of Hell to cause fear and misery to all of humanity. The cuteness is a trick.