At the end of Naruto, Naruto and Sasuke are left as the by far most powerful shinobi, even when they were barely able to control their new powers. Now they are adults and have learned how to use their abilities. But they aren't powerful. They are nerfed into oblivion because the script demands it. They aren't even close to their strength against Kaguya except for a short period against the buffed Momoshiki, even though they should be much more powerful now.
Atm they are nothing more than glorified punching bags. Naruto gets a new form (ch51), but it'll kill him, which feels like a pathetic attempt to create drama by a writer that realised that he nerfed them too much.
The anime has become decent over the last few weeks. It has its own canon. Naruto and Sasuke are still nerfed, but not as bad so far. The most annoying thing is that Sasuke is out of chakra after using one to two abilities which doesn't make sense since he fought for several days without getting his chakra restored while being a lot weaker. Additionally the writers forgot that Sasuke can use other Rinnegan abilities than teleporting, but they also forgot that the Sharingan can see chakra, so....