Jacob later states (Genesis 32:30) "“For I have seen God face to face", which is generally interpreted by scholars as the angel being God.
This doesn't have much to do with my beliefs however. The very first page where night and day are created before the Sun and the Moon (which are created at the same time), all after the Earth is created, including plant life, sets the seed of doubt. It's not how it happened. If page one is wrong, why trust page 100? Yes, modern believers have tried to come up with ways around this as it's patently not true, but that means generations of followers, including saints, priests and popes, have followed the wrong teachings. At the very best, unreliable.