First, 3,000 meters can be knocked out in a single ride with zero issues if you’re a climbing specialist. Two rides if a person is merely an average climber. I’m certainly not the biggest Zwift fanboy here, quite the opposite on some issues, but they are giving people a heck of a long time to “win” it.
Second, and lol, if you think the prize for this mission is bad just wait until you see what you get at level 50 after all those miles and hours in the saddle. Boy are you going to be disappointed.
Third. Prizes are certainly a nice motivator. There should be a lot more for various achievements in game imho, Zwift is being way, way too lazy here, but if that’s the primary motivation to file a complaint you’re riding for the wrong reasons. I mean, at least you’re get something for doing it. The paint job is pretty cool. Wish there was a road bike version lol.
There are lots of things one can do in game and receive absolutely nothing besides the basic exp and drops gain.