Again, Apple had no idea what they were doing. The visionary was gone, it was bean counters and people who didn't know the business put in charge by shareholders. Developing multiple lines that overlapped (IIgs, Lisa, Mac) and weren't compatible with each other, and a fragmented line of Macs that were too expensive to produce for the size of their market. "Sorry Dude" you were an engineer and have no clue what they did wrong. They didn't fail in the late 80's and 90's because Microsoft built a poor copy of their GUI. They failed because their business model, hardware fragmentation, lack of compatibility, and inability to release an OS upgrade for nearly 10 years as they struggled to get even basic multithreading to work in very public view.
Seriously... Have you ever used Windows 1.0 or 2.0? I have, it was a laughable rip-off. 3.1 was okay. It wasn't until 1995 that Microsoft hit a home run, and they weren't the only game in town at that point either. OS/2 plus unix variations, as well as several other DOS-Based windowing shells in the early 90s. To blame Microsoft for Apple's failure to execute is laughable.