Thanks for the feedback.
There are more weapons than just the 1 secondary weapon that you have from the start. You can also buy and equip scopes to the weapon which will increase your range on your weapons.
We are working on making big changes to the combat system in the next update. As an example, movement will be its own resources.
So it will allow you to move and attack, and move again.
Hope this helps.
And we hope it will feel better in the future.