Ok so maybe your little cousin can do better.
Something about traditional animation while not as polished as some flash movies looks better because the small imperfections in the linework shows that this was made with human hands.
There is a lot of soul to this and has a quality that vector art doesn't have. It's why people prefer film to video/digital, hand drawings over vector art, ect.
I like the fact that it was actually colored in because most traditional animation in the newgrounds portal is mostly pencil drawings that aren't even colored in.
It's like the work of this elusive 5 year year old cousin that people keep threatening other artists with that can do better than some other animator due to simple presentation.
It's painfully obvious that these types of people are simply jealous and are reaching for insults when they pull that bullshit line "My kid brother can do better" out of there asses.
Those so called younger family members usually can't honestly do better little alone the person making said vague threat to begin with.
If they could backup there words than they would have something this good to show for it instead of attempting to do two frames giving up and complaining that animation is too hard to do.
This is obviously the work of adults or at the very least teenagers because most little kids when they attempt animation give up because the process of animation is more time consuming than it looks.
-PowerRangerYELLOW