Thats not how APB was built. To make a proper AI for apb's current maps would be very difficult to do from scratch. Not to mention a competent AI that knows cars are going to blow.
Other games too hundreds of patches to make the AI's they had better for online gaming. Given that Little Orbit is not as big of a company as those out there , I highly doubt they could ever make a proper AI for APB.
I do not recall anyone ever claiming it would be easy or a cake walk.
getting a better computer and internet is just as important as "getting good"
Also once again making a proper AI is much harder than you are making it sound.
A complete rework means a "new APB" and with how the rights to APB were sold , this doesn't sound legal to me.
The cost of developing a new APB would not be cheap either and could take years to develop , even if the rights were not sold this could be a bigger problem for a smaller developer such as Little Orbit.
I don't this this is realistic from you. sorry.