Sounds like what you're saying is: You pay for a product, they keep putting resources into it and you get all that content for nothing more than the initial release price. That isn't a balanced system at all.

That'd be like going to a restaurant, paying for one meal, then being mad that the restaurant has the audacity to charge you for every subsequent meal afterward.

A balanced system would be a product that gets continuously paid for, and then continuously developed as well.

Another balanced system is they release a FINISHED product with no plans for extra support aside maybe some bug fixes or something, you pay for that once and you get that product and move on with your day. Dlc is content for a game released after the launch of the game, so an extra charge is up to the developer, think dessert after your meal in the restaurant analogy.

Day one dlc sucks and should not exist. Season passes for non-online games are essentially preorders for dlc content and should also go away.

I'm not saying you don't necessarily have a point, but your point came across really flawed at least.

As for something being a bad game, just don't play it then lol.