Piggybacking off tessbee, since mucho can mean "a lot of" or "many" why not both accepted. Or "Bebi vinos tintos diferentes en México" to capture the variety of red wines tried. I would be assuming the person did not go through Mexico continuing to ask for the same brand of red wine at each locale.
Neither b or v in Spanish sound exactly like b and v in English. I learned to pronounce all the letters in Spanish as a child, but there are also many youtube videos about it.
Keep in mind that Duoling uses text to speech. You can check forvo to see how people pronounce various words in different regions.
"Many wines" means "many different types/brands of wine". For example, in this Wine Magazine article at https://www.winemag.com/2015/10/27/red-wine-basics/ they say "Along with Cabernet Sauvignon and Merlot, Cabernet Franc is part of the essential blending triad that makes up the majority of the Bordeaux blend (and Meritage) red wines produced in the United States" (emphasis mine).