If their rival stole and use their logistics algo, that would probably be "use" of the trade secrets. It doesn't matter if the IP is good or bad, just that it was inappropriately acquired and then used by the defendant.

My point about the value of Tesla's logistics IP is that it doesn't make sense for anyone to use it because it's not valuable: Tesla has messed up on the basic logistics enough times that its clear they're not very good at logistics.