Crying after a visit to the bike shop
I'm quite new to cycling, a student riding a used hybrid bike for budget reasons. I got two punctures (my first since i started riding) last week, and in the process learned how to change inner tubes myself.
After changing the tubes and putting my wheels back on i struggled for hours trying to align the brake discs on both wheels. A few frustrating evenings (first with changing the tires, then with aligning the wheels) later, i managed to get my back wheel aligned. However, the front disc was still grating against the brake, no matter what i tried.
I finally had enough and went to my local bike shop to ask where I'm screwing up. I told the owner I was trying to learn to fix some basic things myself, but was feeling stuck.
From the moment I walked in he looked at me like I was stupid. He took a quick look and tightened the bolts holding the wheel. He then asked me if I was trying to kill myself by not tightening them enough, and shot down my attempt at asking about the alignment, which i took as my cue to leave.
Now I'm sitting at home, crying and feeling stupid. I'm honestly trying to learn how bikes work because i love going on rides. Why am i being made to feel like an idiot for this interest? How can i be expected to know things I can't ask about?
Lastly: I'd understand the shopowner being grumpy about helping me for free if I hadn't just spent 200€ on a full service there two months ago, in effect making me a paying customer.