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You can try the adobe lightroom. It is top rated photo and video editor. It's very easy to use and begineer friendly editing app. You can sharpen the image as per your requirement.
If you are talking about the color, dehazing, filter applying, and related adjustment results, and the software performance, I totally agree that the quality that adobe lightroom does is the top rated one among pros and amateur users.
But, I don't think the operation in adobe software is clearly "easier" than cyberlink photodirector or other competitors in every perspective. The learning curve exists in every tool.
And, most of the color adjustment options are not rocket science and those items are available and pretty basic for every Adobe Lightroom-like editors.
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For OP's concern to sharpen photos, you can try the Dehaze, sharpness, auto color enhancements options in the adjustment room, or AI denoise and AI deblur tools in the Guided room.
As the OP used scanner to digitize old photos, I believe the pixel resolution of the scanned image is already very large, the AI enlarge photo feature (that supports in photodirector subscription version) might not be a good option for OP.
See which features can help you get a better result. But, I'm afraid you really cannot do much on a scanned image source. There are too many restrictions of the image scanning nature that you cannot tackle down easily.