tls is only one part… you could use tls1.2 with DES encryption … you have your choice of encryption suites to support or not.
Also known as a cipher, algorithms are the rules or instructions for the encryption process. The key length, functionality, and features of the encryption system in use determine the effectiveness of the encryption.
using Perfect Forward Security with ECDHE-[RSA], ECDHE-[ECDSA] is pretty uncrackable.
Are you thinking that TLS 1.2 is easy to be cracked? The math doesn’t agree with your impression