Folks, yes proper technique and help in alleviating any bad habits is useful, but there comes a point that the hands are as extended as they can get. At 58 years old, arthritis has curved in both my index fingers and both my pinkys, and a "trick" left hand thumb from a dislocation injury years ago. So I have switched over from standard 34-inch basses to an Ibanez BTB845V 33-inch scale bass. Don't talk to me about "proper" technique, since I use proper technique as taught to me (mumble) decades ago, and that I teach others when the occasion arises.
Don't tell the OP what he must do to be "better." Help him find a bass that ergonomically fits him.
On YouTube, a player will find many videos comparing the popular short scale basses, present and recent past. All the inexpensive ones have their plusses, including light weight, but also their minuses, including skimpy pickups. What is the budget for the new bass? That will narrow the field to a few choices and help with the recommendations.
The great thing is that compared to even ten years ago, there are many more choices out there for the player of a short scale bass, and more string choices as well.