What's wrong with your scans? Are they unsharp? If so, how are you mounting them? Is it the correct height for your scanner? Each scanner is different so you have to calibrate your workflow to your individual scanner. Also, are you applying an unsharpening mask to your images (or some other sharpening step)? Scans will always be blurry when first scanned and can benefit from some sharpening.
Are you having issues with color balance? I don't know about the Epson software, I prefer Vuescan. But in my software, there are options to adjust the exposure level for each color. That helps to resolve all of the shadow detail without blowing out the highlights. Also, it's often a good idea to adjust the colors and/or the dynamic range further in some photo editing software afterwards.
Scanning is a learned skill. It took me a long time to get good at scanning film. I had to find the optimum film height, figure out a way to secure the film flat, figure out how to mask the film, figure out how to avoid Newton Rings (if applicable), figure out what all of the options in the scanning software do, figure out how to properly sharpen a photo, figure out how to properly expose a scan (tricky with slide film), figure out how to correctly color calibrate a photo (done in the scanning software and the photo editing software), and do that for every type of film I use (because the same settings for Portra 800 will look pretty bad with Ektar 100). Plus I had to figure out how to deal with problems like missed exposures and dust removal, which often require additional techniques in order massage a good final product. And that's not even getting into real photo editing, like removing power lines!
My point is, to make a really good scan is a lot of work and takes a lot of skill. That's also why repeating someone else's settings isn't a good idea. So be prepared to spend some time with it if you want your scans to look as good as other people's. Then, come back here with some more specific questions, and preferably pictures of what you're working with, so we can offer advice that's more helpful than "turn all the knobs to 11!"