But it looks like no-one is going to give it decent consideration in the first place, so this is unlikely to happen.
You can't reach that decision based on a single rejection - you really can't. There's a thread in this topic which is more or less dormant now but might well be worth you having a look at:
www.mumsnet.com/Talk/creative_writing/3581699-How-do-you-stay-sane-while-querying-agents
I can't stress enough that multiple rejections are normal in this game.
Yes, some bits could probably be axed/cut/made more exciting whatever BUT then, it wouldn't be my book would it.
There's a phrase which I think is from the film industry but also applies to writing - 'kill the darlings'. You have to be prepared to cut parts from your book, even if you really like them, where they don't fit or engage or move the story forward. It's painful - it's wrenching when you have put your heart into something, but it has to be done. It's very unlikely that an agent or publisher would accept your manuscript as it stood.
Of course, if you self-publish it's up to you, but do think of your readers - if it could be made more exciting, make it more exciting.
I'm in the same boat as you - not a SAHM but as the main breadwinner in my household, I don't have hundreds of pounds spare to spend on professional editing. There are other things you can do, such as forums that have an exchange or points-based system for critiques from other writers (recommendations on the thread I have linked).
It's very difficult and I admit I probably have too thin a skin myself as my confidence plummets with every rejection. But your choice is to keep going, or to adapt your writing ambitions - accept that your writing is mainly for pleasure and self-published success would be a lovely bonus.
The main thing to keep in mind is that you have written a book. Many fail long before that - they mean to do it but don't get round to it, or can't think what to write about, or give up after a few thousand words. You have done it. You have written a book. No one can take that achievement away from you. You could amass a million rejections (believe me, I am getting there!
) but you'll still have your book.