The SM originally included 17 particles but also a lot of parameters which must be set by experiment
While the reduction from hundreds atoms to 17 basic particles had been recognized , by every body, as tremendous step forth ,these parameters were and they are still considered the weak point of the theory

"Give me 18 parameters and I build an elephant for you" A great physician said

Let's make a (silly) example
Suppose that mr Newton claimed :

The attractive force is :

F = k*M1*M2 / D

(I replaced D^2 with D)

K can assume, 18 values given by the experience,see the attached table
Thanks to this formula and the relevant parameters you can calculate all the orbits of the planet with an high degree of accuracy

An obvious remark would have been :

Ok mr Newton , your method is definitly a step forth vs the traditional astronomy but we feel that there is something wrong because you make use of too many parameters
Moreover what's is the physical meaning of these 18 parameters ?


Useless to say that SM is not so trivial but I am sure you grasp the concept
To get rid of the 18 parametrs you must write the right equation ,than you would get one and one only value for K
However tha wrong equation is not completely wrong and , up to a certain extent, it might be of use.

This is the kind of arguments against Standard Model

The theory of the string tries to get rid of the multitude of parameters , whose physical meaning is definitly not clear, of the SM

Is it just a dream ?

Well , I dont know it, of course
Let"s see

However I do not understand why you dont accept that the new generation particle accelerators can cast a light also on this theory,
It is a very well known fact.