You should let ebay know directly that you will not purchase from seller enrolled in global shipping.
You're not the first nor the last buyer to complain about the program. If enough buyers refuse to buy from sellers who use the program, perhaps less sellers will use.
Better yet, tell the sellers directly. Let them know that because the are using global shipping, you will not buy from them.
By the way, if a seller who is not enrolled in global shipping and uses UPS or FedEx, you will be paying brokerage fees. It's the nature of the beast.
Non paying buyers deserve unpaid item strikes.