I can't call the second season of Infinity Train, "a bad cartoon". (Because it isn't. It builds from season one more than I expected it too, and it has some decent creative moments in its second half.)

But in its efforts to be a more cohesive story. It became significantly less enjoyable than the previous part. Since it's main character is literally named MT. (Empty) Because they're a husk of a previous character, and they're defined by what they aren't/don't want to be. Hence, a bad character.

Plus, the (lul so random) humor is almost non-existent and comes from a single character that exists to create and resolve half of the episodes conflicts. So, I go into "the dark" 3rd season, with hopes that it can be executed better.
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The third season is [b][i]baaaaaaaaaaaaaaaaaaaaaaaad[/i][/b]. Better animation and an arguably more compelling lead. (Than season 2.) But it's basically a modern comic that can't make a 'villain arc' to save its soul. With some pretty bad writing to boot. [i]But at least one of the writers got to kill off her ex-boyfriend in a kids show?[/i]