Other languages are complicated too.
Just compare Java 10, C# 7.3, Python 3.6, .... to their initial designs.
However I do agree with you and Bjarne, having also submitted this link awhile ago.
C++20 should have been fixing what was left from C++17, specially regarding concepts and modules.
Instead there are a plethora of other issues, and some of them it isn't even clear what is coming with C++23.
C++14, 17, and 20 do seem to add, as Bjarne says, "significant ... complexity" to what has always been a daunting language. 150 experts--C++ experts, to be sure, but also domain experts--all bringing new features that address their personal itch for the language.