Basically each commercial proceeds as so: Man walks up to bar, asks for a lite beer. Attractive female bartender asks him whether he wants more taste, or less. Man responds that he doesn't care. Bartender gives him the beer with less taste, makings an insulting comment about something involving his appearance, and tells him that when he fixes that flaw he should come back and get his Miller Lite. Man walks back, flabbergasted, in denial and his friends make fun of him.
There are so many problems here, naming them all is simply overkill.
First, why would the man respond that he doesn't care? Actually, even before that. Why would the bartender even ask? From the waitress's description, there's nothing distinguishing the beers other than quality in which one is better than another. Why would anyone ever want to take the less flavorful choice? Would a waiter at a restaurant ask whether someone wanted the good item, or the less good item? Would anyone in any circumstance ask this? Is she worried about supertasters with sensitive tongues? Is there really a market for less flavor that I'm not familiar with? (This is a lot of questions in a row, I know).
Her having asked that, for all the same reasons why would the man possibly say he doesn't care, and not say more. In fact, if there was even a possible reason supertaster or otherwise, he'd specifically say less. There would absolutely be no conceivable circumstance in which he said he didn't care unless he literally doesn't have a sense of taste and it's actually all the same, which maybe is possible, I don't know.
Why would anyone go back to this bar? The bartenders insult you. Sure, I get that they're hot, but it can't be all that difficult to find another bar with hot bartenders. Every time you walk up to the bar, they purposely hand you the beer with less taste every single time, and then they make an insulting comment.
Also - even aside from the insult, how bad is the service here? Until they change something about their attire, the bartender won't give them the apparently better tasting miller lite?
Not to mention the things they are making fun of these guys for are the most played out, easiest things to make fun of in the book. A guy wearing a speedo? Hilarious. A guy wearing way-too-tight skinny jeans? That's novel. Creativity is completely absent. To call the assembler of these ads simply lazy is not harsh enough.
I thought about linking all of them, but a couple really give you the general idea. If you really want more you can just type "Miller Lite Man Up" into Youtube.
I don't know if there's any other genre of commercials more than beer commercials that tends to produce such great ads (Miller High Life guy, Most Interesting Man in the World) and such equally terrible commercials (the Miller Lite triple hops brewed commercials, most Bud Light commercials).