>>96551
>It doesn't allow for competition
There's more than one supplier, there's competition. Again, oligopolies form because in certain industries work better with them–if you had "more competition," i.e. many small firms, you would have higher prices and lower efficiency. Why would you want higher prices and lower efficiency?
>Dis-economies of scale
I wasn't talking about disenconomies of scale., actually. But since you brought it up, diseconomies of scale can and do happen in all markets. It doesn't matter how "well run" it is, increased complexity brings with it increased points of failure, increased overhead, and certain inefficiencies. The maximum profitable threshold is different in different economies, but it is undoubtedly present.
>>96552
<imperfect competition
There is nothing wrong with imperfect competition. "Perfect" competition is not inherently more desirable or "better" than other forms of competition, it's an academic construct. In fact, "perfect" competition is in many ways less desirable, because it implies there's no entrepreneurship, no advertising, no differentiation…in other words, a "perfectly competitive" market is a market which eliminates all of the methods through which firms compete with one another. https://mises.org/wire/why-perfect-competition-not-so-perfect
<Game theory is thrown out the window of the few companies in the oligopoly know about each other's behavior
This is false, on multiple levels. First, it's not correct to say that the different firms know about each other's decisions–the decisions happen simultaneously in most cases, which makes it impossible to know. They might be able to anticipate and predict what the other's decisions are, but that's not the same as firm knowledge. Second, it doesn't matter whether decisions are known or not, and that doesn' mean game theory is "thrown out the window", it just means the game turns into an iterative game rather than a simultaneous game.
<All products are almost equally priced but have their own quirks
And this is bad because…?