Really Thanks Rob, these two days I've also dig the issue of libcur and strawberry perl. Plus your suggestions and research, I believe the following points will help build libcurl on windows successfully.

use MSYS2 libcur-dev, don't download directly or use Alien::Curl etc. since libcurl use libssh2.dll,libcrypto-1_1-x64.dll and many others, you may miss something.

don't use pkg-config of strawberry perl just edit --libs --inc parameters

use Inline::C other than Net::Curl, the latter is too linux to run smoothly on windows

Thanks again Rob, your replies and suggestions is like a guiding light.