Luka Doncic did all he can, people who keep calling him not doing his best are not realizing how much work load he gets on offense, which means his defense may lack a bit. Warriors kept Curry not defending anyone for many years while they won all those rings, so it's understandable.
I do hope that those criticism on him will make him a better player for next season. That's how great players responded, like when we hear that Kobe after losing in the finals to the Celtics, went back in the gym the next day, lift some weight and then go to a court to take 5,000-10,000 shots.
Dallas needs to get some amazing defender to help both Kyrie and Luka, because it feels like that is what they are missing right now, if they had some amazing defender then they wouldn't have all of these issues. In the end, we are seeing them doing whatever they can and that is a good thing, they were at the finals. Boston winning in 08 and 24 is also a great meme these days, it's such a big Kobe hate thing and funny to see as well, if Kobe was still alive he would have laughed but be annoyed as well.
They are good already in my opinion, they have all the positions covered up. It's just that they don't have the experienced in the finals and obviously, Celtics have been here before and they have the perfect system as evident of them winning 60+ games in the regular season.