Groom attire horror

So the lady I work for her cousin just got married yesterday, she wore a gorgeous white wedding gown with a stunning veil and the groom wore a blue polo shirt( not even a dress shirt) and jeans with sneakers. Some of the guests were making comments that they paid all this money, flown so far, brought gifts and in their words "the groom couldn't even spend $150 to rent a suit" they also said it was weird because the bride was all dressed up and decked out in wedding attire and he looked like he just came back from the grocery store. I saw pictures and it's literally what my fh wore to go golfing today for his bachelor party. Has anyone been to a wedding that have groom attire stories or even guest?