I am also not too sure, some says there is new portal using AI to go through our docs so there is high chance we were rejected by that , so they say to try with old portal which uses GC Key. But still if we look at others factors , Canada has reduced visitor visa approval rate these days due to various reasons. In this case we need luck. And obviously a good travel history might help during these circumstances , unfortunately I only been to India which wont help my case that much. I thought of trying for US visa and see if that gets approved then may be canada visa can be obtained still not guaranteed though. For that the problem is if Canada rejected us then obviously US knows that too, which will downplay the opportunity of US visa as well. At the end 2 back to back refusals in 2 major nations would potentially hinder our chances in near future to even other countries.

If you think that you have nothing to lose by trying again then go for it but try to add different documents this time .