The only places I’ve had to cut out was shoppers, and I go there so rarely that it really didn’t matter.
Their grocery stores have been garbage for so long that “boycotting” is such a moot point to me. They’re the only nearby grocer that forces you to buy the amount of a listed item to actually get the discount (ie, if an item is 2/$6.00, buying one charges you full price, not $3.00). Between that and many items being ~5-10% higher than the other grocers, I’m not sure why anyone shops there to begin with.
There are a lot of reasons to not bother going to Tim Horton’s, and the lids on their cups is not one of them.