I enjoyed your original rant against economists and the damage some of their bold but ultimately baseless claims can do, but many of your examples seem ill-chosen. It's really no more complex to incoporate bundling vs budget constraints and the time value of money into neoclassical economic models than it is to incorporate friction into a physical model. Appending "given no corresponding increase in supply" to a claim that the price of a commodity will rise given an increase in demand is really no more of a "patch up" than appending "given the absence of air resistance and other frictional forces" to a statement that the earth's gravitational field will cause a falling object to accelerate at approx 9.81ms^2. "Demand" being the level of quantity which would be purchased at a given price at a given point in time is as fundamental to microeconomics as the concept of net force to Newtonian classical mechanics.

Sure, a number of economists attach undue weight to some underlying assumptions which are only partly true, such as economic actors to some degree exhibiting "economically rational" (perhaps akin to a disciple Newton fan asserting the wave nature of matter has no meaningful implications for their bodies, this kind of abstraction is harmless when applied to sufficiently large numbers). But whilst this economic model appears to break down at levels as simple as individuals being ineffective at computing stochastic optimisations in their heads, it works rather well when analysing the behaviour of crowds. It's not so good at identifying when bubbles will burst, but then meteorologists can't predict the weather next year with any reasonable degree of accuracy either, and that's arguably a simpler system to model.

Where economists overstep the mark is not so much the tendency to oversimplify as the fusion of normative arguments with their models, such as the sleight of hand that dresses Pareto "efficiency" as a static optimisation problem rather than a rights claim made on behalf of the status quo.