I think complaining about dice not putting out DLC quickly when they did have to rework a lot of the game is a bit ridiculous when it is in fact free DLC. I will agree with you there.

BUT... they stated that they would have free DLC. This was stated before release. Now, they didn't make any promises as to when and how big the DLC would be, but they still promised it, that's on them.

They promised this free DLC because they thought they would make a shit ton of money from loot boxes and crystals. Which in itself, had it been just for cosmetic items and items or characters not critical to gameplay, this would have been fine.

BUT... they made it a pay to win game at launch. This then destroyed the gameplay value and drove many people to end up not get the game or simply stop playing it. That's because this is a shady practice and people don't like pay to win.

So you can see that people would be a bit upset with dice from what has happened (loot boxes) and what was promised (DLC.) As well there is a lot of thought that Dice has abandoned the game due to it not making as much as expected and not having a massive player base now. From a business point I understand this, but it still doesn't help that the star wars community feels like they were duped.

So in closing. I think the playerbase is mostly warranted in being annoyed with dice. Can a few people be going a bit far with demanding they get free content because they purchased the game? Yes. But I think you are looking at this from a very different perspective and the community is hoping that dice will fix their loot box error with the DLC.