You have correctly identified the problem, which is lack of passion. This is part of why experienced entrepreneurs tell noobs not to worry about somebody stealing your idea. It's rare enough that even one person cares about the idea enough to make it real. Most other entrepreneurs already have ideas that they like just fine.
As others say, you can try to sell it, although it sounds unlikely. But if you want to try, ask yourself two questions:
Who specifically would be passionate about this specific idea?
How much would that person have to pay to replicate what you have?
The first question gets to how to market this. Depending on the topic of your MVP, maybe there's a wannabe-entrepreneur somewhere who just couldn't come up with his own idea but has money in his pocket. You need to find that person.
The second gets at pricing. Most MVPs are throwaway code. And even if it was well written, most code without the original team gets thrown away, because it's expensive to find somebody who knows the domain and tech stack, get them up to speed, and clean up the tech debt. So the fair comparison is something like: how much would it cost a discount outsourcer to build a replica? That ceiling is probably pretty low.
Now you can do the math: fairly valuing your time, subtract your cost to find, sell, and close that prospect from your expected selling price. For most people, that estimated return is negative, especially once you weight for risk. Maybe you're different, but be sure you have a good understanding of why.