This sounds like not knowing enough about the software and limitations (shared by all engines).
I myself called this a hobbyist tool for lack of knowledge.
I have since changed my stance and am blown away at the the power of this software.
What took me over 2000 events to do, I can now do in under a 600. This is called acquired knowledge.
And what was 15 fps cruises at 60fps and no bottlenecks.
Like anything in life, you just have to learn the tools. What they can/can't do and adjust accordingly.
And trust me, I still don't know how to do 80% of the things I haven't even tried yet. Lots more learning as new games get developed.
This is spot on.
As I've said several times in defense of C2, its because its such a simple game engine to use, most users very quickly make a poorly optimized game that struggles even on strong hardware.
But if optimized well, C2 can achieve amazing results even on mobiles.
The problem is that optimization requires someone with a lot of programming/C2 experience.
C2: Easy to use, hard to master.