It's a free country. Tools are available for relatively cheap and information is available for free. If you really make the effort, no need to keep up with bad service. it isn't like a shop possesses the unique black magic and has a monopoly. It is just a bicycle and the technology hasn't changed that much over centuries. if anything repair and adjustment got easier.
In most cases just the time it takes to pack up a bike and bring to LBS is more than what it takes to adjust or repair. And unless we talk about very rarely used specialty tools, the tool cost is amortized after the 1st or second use compared to paying an LBS.
the time one takes here to complain about LBS could be used for learning repair.
This isn't directed at the OP specifically, but at threads like this in general. I vote with my wallet.