J. Kenji Lopez-Alt did a study where he concluded that people who think they like Mexican Coke more than Regular Coke simply enjoy tasting Coke out of a glass, and the perceived cane-sugar vs HFCS may just be a placebo:
https://www.seriouseats.com/coke-vs-mexican-coke
But YMMV. Even having read that study, I still prefer Mexican Coke.
Even if a placebo, it's still true - I can't stand canned coke. I can't drink it, the taste to me is horrible.
If all your brain/tongue perceives as horrible is the taste of the aluminum can, you could always switch to buying Coke in glass bottles, which are more expensive than cans but still cheaper to buy in bulk than Mexican Cokes, and can be found at most grocery stores.
Or, if being limited to Mexican Coke means it reduces your overall soda consumption because you're only able to drink it when you're near a Home Depot, keep doing what you're doing. You'll probably be healthier for it.
Or just pour it in a glass?
You're assuming that the taste is only affected by what it's being served in, not how the liquid was transported. For all we know, aluminum imparts some sort of off-flavor into the Coke itself that the OP doesn't like, in which case it wouldn't matter if he decants it into a glass first--it would already have been "tainted" by being held in the aluminum can.
I also can't stand plastic bottled sodas, and can tell they've been sitting in one even if drank out of something else after opening.
I fear the bottling/canning process and length of time spent in it gives it a bit of a whiskey-barrel style finishing taste alteration.
And twice as much caffeine per ml.