Doesn't Jougan come from the combination of Uzumaki/Senju dna and Hyuga dna?
Even if you deny that, you can't deny that Boruto was robbed in the first place for not getting Byakugan since his mom is a full blood Hyuga. They also mention that specific training is required to awaken byakugan yet Boruto is never given that training for no reason whatsoever.
Not at all, Jogan was given for the heck of it. Kishi intended to give them Byakugan eyes. He forgot to not that it matters Hinata became was an outcast of the Hyuga clan so her children not inheriting their KKG wouldn't have mattered as much. Hinata's blood purity is questionable at beat all purebloods have black or brown hair(anime) she has purple hair as one example not that it matters. Boruto is given training by Hinata how can it be said she's not giving him the trajning needed to awaken the dojutsu if it's possible. As for Uzumaki DNA Naruro inherited hardly anything Uzumaki related from his mother so that's a no right there. That's why I said Boruto needed more handouts.
Point is, Boruto deserves a doujutsu, if you claim he doesn't then neither does Sasuke. Why should Boruto not get one when he has the dna to get one just like Sasuke?
Boruto doesn't deaerve a dojutsu, Sasuke has one because of his clan. Boruto's mother was outcasted, her name is Uzumaki, Borat's name is Uzumaki what on earth makes you think he deserves a dojutsu? Although I agree they should've given him the Byakugan if they were going to give him something.
Curse seal was also a handout for Sasuke so I don't really get your point there.
Curse seal wasn't a handout it was designed to erode the user so they would be easy targets for Orochimaru's body take over. Orochimaru gave it to make Sasuke his new vessel and compatible for take over. Momo gave it because he felt like giving a free power up pulled out of his ass after he was killed of by his enemy.