C++ pointers and refs not fully interchangeable, since ABCs can't be dereferenced
Most "default behaviours" are bad or dangerous
No built-in reflection
Language implementation is visible in the programming model
"new" encourages new users to think that pointers are a key part of the language
Enums are dumb - for anything which exposes itself to a program's UI, so much string conversion stuff needs to be put there by hand that it's not worth doing.
Terrible language for multi-language wrappers since the symbol name-mangling is undefined