It sounds like a very tough time and I can say I both understand and empathize with your feelings.
In my second year I hit a very similar wall and trawled through forums, such as this, for answers which I couldn’t find. The truth is no one can truly answer your question but you. What I can say now that I’m approaching my viva is that both quitting and persevering have pros and cons. I always think if I had quit I would probably be a happier person but I suppose I’m not a stage yet where I’ve been away from a PhD long enough to see the career benefits of it. I hope you can find the right answer, both are scary but brave decisions.

I am extremely anxious and nervous about my viva. Initially it was hoped to be 3 months away but now, because of circumstances outside my control, it’s 2 months away. The biggest anxiety on my mind about my thesis and the viva is the impact covid has had on it. Covid interrupted my human intervention study leaving me with limited data that a) I had to analyze differently than intended b) was horribly underpowered. Because of this I added another chapter to my thesis but it’s not a stand alone chapter. A lot of the work in the thesis is novel, it’s interesting but ultimately the lack of data is.. bad.

I haven’t heard from people in a similar situation, in fact I don’t know anyone who is but I feel there must be someone who has gone through the same thing with Covid.
Has anyone had this happen for their thesis/viva? If so what happened?

Also when / how did you prep for your viva?