(shrug) You cannot reasonably expect that a programmer in 1993 would have a clue about the hardware their creation would be running on, a quarter of a century ahead in time... if you try to match what you are trying to emulate, you might just get results that work.
As Windoze is "warranted for no purpose whatsoever", what were you expecting? The points about PC horsepower needed is quite valid. However, it strikes me that PCs have gradually moved backwards, in terms of CPU speed needed to produce a useful tool. Microsoft's ability to write slack code far exceeded Intels ambitions to make faster computers. That's why todays Amiga emulators on PC are slower than they were say, 16 years ago.
Anyway, on a more positive note, if you try running some AGA games with that setup, you might have a better idea of what to expect. AGA versions are much more stressful for emulators, although they might not be the software you actually want to run... CD32 titles might be especially problematic, as that had hardware found in no other types of Amigas.
... It is nearly always a very good idea to choose your software first, when designing and building a system. Very important for testing out a emulation system, in what software you test with.