However, I do know that a lot of objections to it from the people I follow are around the borrow checker and both the friction and high[0] compile times it causes.
[0] to put that in context, Jon is frequently annoyed by the sub-second linking time incurred by LLVM because it is more than an order of magnitude longer than his largest program (~60k line game, IIRC) takes to compile.
What makes it worse is that complication doesn't even exist for "good" technological reasons; it only exists for inertial, industrial reasons like compatibility with C and 1980s naivete -- both because of and in spite of it, since, like the other person said, even more complexity was bolted on to try to force new lessons without breaking backwards compatibility.
I used to love C++, since I thought its complexity was somehow, fundamentally necessary for a lang to be a "fancier C". Once I learned Rust and found out that was not true, I now hate C++ with a passion and can't wait until it completely displaces C++, which it should do ASAP[0]. :D
THAT SAID, some people (who are much better programmers than I am), say that C++ is the most expressively versatile language around, which is at least a "good" technological reason for its enduring existence. That's one I can't relate to, though, since the people who are saying that tend to be talking about very advanced, byzantine aspects of C++ that I never got to.
C++'s complexity is also a product of design choices like using templates to do both generics and metaprogramming, which in hindsight probably made things much harder than they needed to be. Rust has the benefit of being able to avoid decades of C++'s missteps.