That sounds like a scene and dialogue that doesn't need to be in this or any other movie AT ALL.
Stark//Banner creating Ultron was one thing but Stark making "better" web shooters for him is bull ****.
The implication that Peter made faulty web shooters "or whatever" is bull ****. Peter Parker is a genius, a kid genius at that. At most any potential scene should just be him raiding Stark's tech to make his own improved web shooters on his own. There is no need for Stark to make **** for him. At best he's just the guy with money.
Now a scene like that wouldn't ruin the movie or Spidey but it's just doing **** just to do it. Totally unnecessary and serves no purpose.
It does serve a purpose. If Spidey is going to be on Tony's side, they're going to interact in some way. Not just, omg he's my idol blah blah blah.
However, none of that my idol **** was in my mind anyway. They can interact and develop a relationship simply by both of them being geniuses that love science. That science bros **** is universal.
Stark making web shooters for Pete is just stupid.
The only other problem he's consistently had is running out of web fluid. That's it.
Where are you getting this web shooters break down cuz of how Pete made them from?