First of all don't assume that the wrench that was rude to you has any investment in the brand identity of that shop or participates in their future success. It would be safe to assume that he is a $9/hr hack that only learned to wrench on bikes by wrenching on bikes. Guys like that are very very sensitive to any customer feedback that may implicate their friend/fellow wrenches that they did not competently do something on a bicycle. I've found that one of the secondary reasons more people don't cycle is the treatment they receive from their LBS, with the bike fit they receive from their LBS dominating.

I had a nightmare experience with a custom wheel I had made for my tandem a while back. The shop owner and I talked at length about my outlier needs for a bombproof wheel, but wanted to build it "his way" using 14/16 Keirin spokes (it is mostly a fixie/hipster shop). In the end the wheel folded in the first five miles. My experience was similar to yours. I went back and the hipster who built it accused me of detensioning all the spokes and "messing with the wheel." The wheel was completely detensioned through a full quarter of the spokes (48h) and had mildly tacoed. He tried to true it back to something resembling a wheel. However, at this point the rim was "bent" and the spokes did not have even tension, which was necessary to make it round and true. A strong wheel has even spoke tension while being naturally round and true. If you have to increase/decrease spoke tension (which you do) to fix the wheel it inevitably leads to degrading wheel integrity due to uneven spoke tension.

Long story short for me was that I learned that the shop employees, and the owner had a "circle the wagons" mentality of us vs. the customer. All I wanted was the original custom wheel build I had advocated for: 14g straight spokes. In the end the shop owner actually sent me a check giving me my money back rather than just rebuild the wheel in a way that he disagreed with.

Now, to be fair to this shop owner, he was citing Jobst Brandt et. al. from old listserve posts where some truly knowledgeable wheel builders were commenting that in general wheels with double butted spokes are stronger than straight gauge. However, those original posts, in context, also established that the double butted spokes need to be sufficiently strong for the application (and if so, would actually prevent pulling spokes through rims). What he was neglecting was that in the original context of those discussions the same authorities also established that in outlier applications straight guage 14g and bombproof 13/14g spokes are actually necessary. The increased risk of cracking a rim being unavoidable as any less spoke wouldn't build a strong enough wheel to survive. Zinn cites this in his books (caters to outlier big cyclists over 6'6" in his custom business) as does Brandt.

Moral here is that most LBS aren't at all interested in a relationship with you the customer. Most LBSs are actually only marginally surviving and are only doing so with a predatory relationship with the customer. You'd be surprised in how many reputable shops the wrenches and cashier jockeys are constantly encouraged to increase the repair or sales ticket to drive revenues. Similarly, shops are holding employees accountable for any repairs/sales that are coming back. That hourly employee you dealt with may be just and ass, but he might also work for a shop manager that will ride him hard if they have to revisit a repair ticket. Any additional time making right your situation is not time generating revenues on other tickets. That's the funny thing, most shops can't keep up with their backlog of repairs and tunes, but keep poisoning the well in their relationship with customers.

Its amazing the entitlement that wrenches and shop owners have for their community. That somehow they are the nexus of the cycling community, and that the cyclists "owe them" or that they have a "right" to be in business. Start a relationship with you local shop owner. Share your experience with him. You'll often be surprised to learn that the problems you are having have their genesis with the shop owners fundamental lack of anything that could be considered business acumen.

Last point, get a truing stand and buy your own bike tools; wrench on your bikes yourself.