I have to say I have been happy with the results of some images after a certain amount of processing. (More than I am used too)Never be afraid to ask, that's what forums are for. It's never nice when you pay out for new gear and not getting the results you were hoping for. For what it's worth, I have the EM1-II and have been more than happy with the results, and for large parts are comparable to the images I get with full frame. I must admit, it took me a while to get the best out of the Olympus files, and I'm sure there's still room for improvement.
For best results you ideally want to shoot in raw and process yourself in something like Lightroom. I now have a preset for my Olympus files that I have created which I'm happy with and look as close as possible to my Nikon files. As a result I can just import with that preset and then PP is minimal, often just requiring a crop or WB change. When you start out Olympus files do need more processing than FF imo. For example my Olympus preset is much more 'aggressive' than my Nikon one, with heavy contrast and some clarity etc applied, as well as sharpening of course. With the Nikon file all I've done is use the camera standard profile, add +5 dehire and a touch or sharpening.
I had a canvas printed (trying out Trade Canvas Print) 30" X 20" of a cropped image I worked on in Capture One which has come out looking great. Proof that you can print to a reasonable size without issues from micro four thirds.