meh Star Trek shuttle set

I know I’m probably going to get some crap for this being that it was a free set, but whatever. I just finished the Star Trek shuttle set and I’m fairly disappointed in it. It feels very fragile and hastily designed. The doors barely work correctly on it. Most of the walls feel like they could fall off from a touch. The worst part is that a standard minifig does not even stand up inside. This is definitely not a set to be playing with. It almost feels like they make them 18+ just so kids can’t play with them. Thoughts?