Yes, she is shrill and annoying and he is chilled out and cool HOWEVER they have five daughters, unmarried who together with his wife will be basically destitute if he dies.
In those days a simple infection, broken arm or whatever could quickly kill you. Even if there was a small sum set aside for them they would end up like Miss Bates in Emma; a very meager existence, at the bottom of their social class and unlikely to marry, thus making it a lifelong situation unless they became governesses - the only respectable employment they could find.
The mother realises this and is trying to get them their own households ASAP before they lose the entailed property. There is not much of a dowry, split between five to make them attractive to suitors. Marriage was a BUSINESS DEAL in those days, and if you're lucky you'll be happy too. Mr Bennett just didn't GAF. All this follow your heart business is not helpful when the six of them (widow and daughters) are stuffed in a tiny cottage and relying on handouts.
It was not unreasonable to try and match one with Mr Collins SO THAT THEY COULD STAY IN THEIR HOME. The bookish one would have been a better match with hindsight but she was not unreasonable to expect Elizabeth to do her duty and save the family. For every story that ends with a Darcy there are a hundred more ending in the Workhouse.
Of course they would not end up with zero, probably some small allowance would be in place, the reality is that the women COULD NOT LEGALLY INHERIT Mr Bennett's estate because of the law at that time regarding entailed property.
AIBU to think Mrs Bennett was the better parent because she cared about the welfare of her children even if she went about it in a bumbling way?