The more I look at spells the more I think, "Wow, that's amazing!" and then I find a spell of the same level and class list and think, "Why on earth would I even use that when that other awesome one is available?"
There seems to be more than just a few of these types of spells, at least to my delicate senses.
On the top of my list of bad choices would be Witch Bolt. It's just bad. There's virtually no reason to cast this. You're actually better off casting a damage cantrip after the second round of Witch Bolt since at least it has a chance to crit. "Oh, you managed to hit me for 3 points of damage. I guess I'll just move over here and... oh look, your puny spell has fizzled out."
Second would be Ray of Enfeeblement. It's just plain awful. First you have to hit with it, it's effect is considerably weaker than the effect of any other 2nd-level spell, and then on top of that the target gets a chance to save against it every turn. Why not just cast Hold Person?
On the amazing list would be Plant Growth. Yes, Plant Growth. Seriously, read it, it's amazing. 150-ft. range and can make a 100-ft. radius area instantly quadruply difficult terrain (4 squares of movement required for every square moved) with no saving throw
Then there's Plane Shift. Wow. Combines Banishment with multiple target instantaneous transport across all planes. Umm... ok? Thanks? I guess?
What other absolutely awful spells can you think of? What other amazing spells can you think of?