How to fix very protruded/flared angled out teeth to straight reshaped teeth? (photos)

While porcelain veneers CAN be done here, I would look into braces again.  The movements wouldn't require 2 years and the effects can last a very long time.

You are a perfect example showing that just "straight" teeth are only one part of a nice smile.  The angle/ slant/ flaring of the teeth is also important.  Another critical element is the shape of the teeth.  Yours are very triangular.  Reshaping of teeth during orthodontic treatment is a common practice as it both creates space and produces a more aesthetically pleasing tooth.   Since your upper teeth appear to be resting on the lower, moving the upper back to reduce the flaring with require moving the lowers as well.  This is a full orthodontic case that will require good skills to manage the tooth movement you need.