First post, same content as many others. Whats up with my plant?

TLDR: is this fungus? Nutrient burn? Other?

Ok folks, what the heck is wrong with this tomato?

Type: BHN-589
Soil: 1:1:1 vermiculite, peat moss, manure amended with worm castings.
Zone: 6b
Drip irrigation every day at 5:30 am.
pH of soil unknown, assume slightly on the acidic side of things.

I cannot for the life of me figure out whats wrong with this plant. It shares the raised bed with 5 others that are thriving. At first i thought it was extra thirsty with the brown leaf edges and curling, so i gave it extra water in the afternoon, no change in leaves. Then I thought nitrogen burn, maybe the soil is too hot, but all the other plants show no signs. Is it possible its just a lot more sensitive? If its a disease, should I get it the hell out of there asap? I know it looks fungal, which is probably the right answer here, but the hybrid was bred to be disease-resistant (im not sure that means much, its all relative). If it is fungal/blight, what is the likelihood of it transferring to its neighbors? I was trying to optimize space, hence the two foot deep raised beds filled with the good stuff, but they are spaced closely even while im training them all in an outward direction. If theres even a decent chance of transferrence, ill prob just pull it. When I planted all of them, this one was pretty lime green compared to the others' darker shade so maybe it was underfed and is now reacting? It has set one tiny fruit so far, is in photos, also has three healthy looking flower clusters above that. Lastly, the new leaves are quite dark along their veins.

In the bed with it are: sungold, brandywine (HUGE leaves), black cherry, black krim, and better boy.

I am not a tomato expert, but I do have some horticultural experience so feel free to get technical. It just seems so out of place amongst the healthy plants. Bought it on a whim cuz nursery said it was a winner of best taste and growability. Maybe I got a wack clone, no idea. I have also pruned off many of the lower leaves in the photos.

Thanks in advance for any insight.