They’re not interested in doing cheap repairs on used bikes; it’s not good business for them. I owned a retail business for 15 years and sometimes there are customers you just don’t want. What do you do? Do you say, “Sorry sir, this isn’t going to work out?” Nope. You just kind of hope they leave. I’ve been on both ends of this. I’m not really defending them, just being realistic. They either correctly or incorrectly came to the conclusion that you weren’t of value to them. So that’s one perspective I can offer as a small business owner.
The other is is that the current crop of 20-27 year old shop employees is, generally speaking, terrible at customer service. So I think the answer is somewhere in between these two points.