Toriyama "canonized" him in a random one shot, so now instead he is a caring loving father (only to Goku, never even spares a thought about Raditz) who literally developed a conscience randomly after years of genocide because he saw some aliens who reminded him of his wife and younger son. He is also super duper smarter than any other Saiyan because he somehow was the only one who thought for a second and realized all the red flags Frieza was putting out about killing them. It also added Goku's mother, a literal void of personality who is just a generic nice and caring woman who is nothing like any other Saiyan we've seen.

So basically he just made the "Superman" rip off much more exact, destroyed every reason why fans loved the original Bardock, and retconned a shit ton of Saiyan established lore. Just for a throwaway character he never again references or uses. He ruined him just so he could "own" the character himself (instead of being an original creation of the anime team like all the movies).

At least nu-Broly is still an interesting and good character who was used very well so far despite being a lot more generic.