What do you mean by "they will force someone out of Canada just because some delays with residency requirements"?
You do understand that you did not meet the R.O., right? This is not the fault of Canada, IRCC or CBSA.
This means that until you return to Canada, you have no idea (really) what is going to happen when you encounter the CBSA officer. As mentioned previously, you will be allowed to enter; no idea if it will be quick and easy (would have to agree with
@armoured that it may not be), but who knows.
The R.O. `rules' to maintain PR status, while certainly an issue for you now, are far more relaxed/generous than if you were a Green Card holder in the U.S., trying to get back
there after being away for 6 years.
Good luck!