Such as? Supposing that the people behind Let’s Encrypt are competent (I believe they are) they will no make use of obscure, complicated features of OpenSSL, use outdated ciphers or allow downgrade attacks.
There’s a difference between attempt to break SSL vs succeed.
I’m starting to interpret your response as trolling. If you distrust our website so much then don’t post here. No one is forcing you to. Patrick already explained you have a mailing list for non JS communication.