There’s probably nothing completely wrong with that bar. Just some material tweaking, lights and texture strategy. Currently you have 1024x1024 bump texture which is used at 10% at maximum, most likely even less. Because of object’s form of course. A big waste of precious resource. Since that bump pattern is repetitive (one exception would be on the end, but let’s forget it for a moment) you could make just one segment of it at, say, 256x256 and set it to repeat 20 or more times on texture tab. That 256x256 would be covered by 50% as a minimum giving a lot more nicer texture.
For the material, if that’s a brass, it should be reflective and have to have something to reflect - World’s texture e.g. AO could be set Add or Multiply. I prefer Multiply because that gives more shadows, whereas Add seem to give more light which you could add anyway, if needed.
Another way would be make and texture just one segment of that bar and use Array modifier to extend it. Here is a bit of example of the last one. And if you really need that end dot, make two arrays