Tell me why would I apply to immigrate after five years now home. I have savings, born in the county, go to all the work of applying and ,yah Im going to stay here. This intent to immigrate thing is just an action used to fail people who basically are qualified.
You apparently have not paid attention to news either in Canada or China for the last 30 or so years. And including quite recently. Prior to HK transfer, the phrase (if I remember correctly) 'three legged stool' was pretty well known - referring to wealthy families establishing business/residential ties in mainland China (to make real money and bureaucratic ties), HK (to have access to West/capital markets), and Canada/USA for protection/safety/savings should HK transfer go 'bad' (and the strategy was often to send spouses/children to Canada to establish the PR/citizenship base).
There are PLENTY of cases of Chinese/HK families attempting to establish residence in Canada as a 'backup' with no intention of actually residing - as a backup of sorts. (And lots of outright fraudulent cases - some quite high profile - up to and including fake records to show residence and get citizenship). It has also been a periodic political issue in Canada - that some PRs, including spousal, use Canadian PR status as a convenience factor, or intentionally stay in Canada only long enough to get citizenship and then leave (and then, by so-called 'chain' sponsorship, try to sponsor spouse to get PR status with no intention of moving to or residing in Canada).
Although this doesn't apply just to China (some other countries periodically mentioned), it has been a consistent issue with respect to China.
So you believe YOU are the honest applicant being treated unfairly - but if you look skeptically at your own file, you'd see all you really provided was emotional claims to want to return, and with close to zero current ties to Canada (not having visited in five years, no bank account, nothing). Again, looked at skeptically - you actually perfectly fit the profile of someone who just wants PR status for spouse for travel convenience and maybe to get passport down the road. (That's not a criticism or questioning your bona fides - your life is what it is, and that's fine - but you fit a profile and don't even know it).
Again, you're this upset and YOU HAVEN'T EVEN BEEN REFUSED. Geez, they just asked you for some additional documents.
And as far as I can tell from what you've written, your relationship has not been subject to any special scrutiny - they were even a bit lenient about the fact that you didn't submit marriage certificate. If they wanted to ding you just for money, they could have refused you right away on basis you're not married (because you didn't provide PROOF OF MARRIAGE).