Strained mother relationship

[BMWL]

Hi everyone. Just need some advice - I don't know who else to turn to.
Myself and my husband are currently living with my mum and dad whilst we wait for our house. It has run over massively and we have been here for 2 years.. looks like another 6 months is on the cards.
I am getting severely frustrated with this, as is my husband and my parents because obviously we all just want our own space.
I feel like the relationship with my mum is becoming really strained. I can't even have a proper conversation with her anymore without feeling frustrated.
She is a very cryptic person - will say one thing but I know she means another. She always seems to be in a bad mood and is never happy anymore.
She has suffered a loss of her mother last year which I don't think she has properly grieved, but I feel like she is taking it out on me. She is constantly complaining that me and my husband are messy or not doing certain things. We aren't messy, we are very far from it - just not up to her standard.
I really don't know what to do anymore - I feel the longer I am here the more I will end up resenting her. I feel upset even typing this because our relationship is not what it used to be and I just don't know what to do anymore
Please help x

Could you rent somewhere ? Or live in the house while it’s being renovating?

@sauvignonblancplz we can't because the house technically isn't finished being built. The rent around where I live is too expensive. We have exhausted all of these options unfortunately

What would you do if you couldn’t stay with your parents? Are you paying rent to them? I don’t know how long you expected to be there but they’ve been extremely accommodating taking you in and it sounds like it’s become very fraught and won’t improve until you move out. I once moved in with my best friend and within a year we were barely speaking, it was awful. You and your husband are in their space, she’s had a traumatic bereavement, she finds you messy whether you agree or not, and there’s apparently no end in sight. You need to look at your options.