Yes.No.
Hunter's Mark alone is bad post-level 8 or 9, moving into level 11. From levels 1-4 the Ranger is one of , if not THE highest damage class in the game because of Hunter's Mark, and it is still really really good around levels 5 and 6.
The Ranger hitting for ~31.5 damage every turn at level 5 is not bad. It is outperforming the Greatweapon Battlemaster Fighter who is only getting ~23.15 at that same level with two uses of superiority
I meant that Hunter's Mark is at first level spell.
First level spells are supposed to become obsolete in tier 3.
So if you want to design an entire class around at first level spell you have to do the same thing as you do with the warlock/EB/Hex and design within the class ways to boost it.
D&D since the original edition was designed off the concept that spellcasters would transition to you spell that they level up.
The core issue that I constantly constantly repeat is the fact that wizard of the coast does not want to create new spells for Ranger.