I'm sorry, SRT. I find losses very hard, I imagine for you as well.
It's hard to concentrate overwhelmed, if that is part of the reason for the low score, pressuring yourself will make things worse if what you are describing is already feeling too pressured.
Trying to stay strong with others while falling apart inside, and whenever alone makes everything unreal and terrifying for me. And doing things well can start to feel like acting. It is, and it isn't, if people see you as strong. I don't know if this is right for you, for me, I need to stop pretending to be fine with at least one other human being, feel pain, show it, and feel their humanity and compassion back in order to some through.
Don't see yourself as weak. You are lucky to have friends, you say that you do, and for them, being able to support you, someone they see as strong, could be a gift. Offering it to them is the only way I can see for coping, but my brain works in a way that is very symmetric. You are experiencing pain from loss, you therefore need something that is strong enough in the other direction of gaining instead of losing, and that would have to be intense friendship. Such as increased caring contact and connection with them. I hope I am not offending, I do not know you to offer this advice, so please understand I am just trying to offer what I can, if it is valuable I am glad, and if not I know there are others who may be more on topic with what you need.
I also think that so much loss makes it hard, scary to trust yourself to others by caring and wanting to be cared for, as it risks losing again. But it is the only way through these losses and this pain, you cannot go around it.