I also tested 4 different bots vs. their conspecies-cousins, and all the conspeices always did win 5-0 (and I concluded I didnt needed to making more or longer trails) and if the conspecies is so important, why doesnt it evolve in the first place?
You have to understand that evolution works from the individual's point of view, never from the species point of view. At least, that's the mainstream opinion in science at the moment.
So, while a
species is more fit with a conspec gene, and thus able to win F1 battles,
individuals that evolve to eat others of its own kind, especially when there aren't any other species around, have suddenly gained a huge advantage.
Imagine if I lock you in a room with another guy, and give you a bowl of jello every day to eat. You both will probably be alive, but you have to share your limited resources. If you kill and eat the other guy, you gain a huge advantage. You get all his meat, and you get the whole bowl of jello every day.
So why aren't we all going around killing and eating each other? Well, groups of genetically close humans tended in the past to battle, and manytimes eat (especially the heart, as part of ceremonies), other groups of non-genetically close humans.
Ants likewise often battle each other over territory, but only primitive ant species battle within the colony.
Basically, it is only advantageous to not kill
close relatives because they are genetically similar to you, but to utterly decimate fourth and fifth cousins, because they aren't as likely to share your own genes.
So especially in an arena where it's only you and the plants, there's just no reason for a conspec gene. This isn't a limitation of the simulation, it's a fact of real life. Cooperative bacteria
will evolve cheaters that steal food and eat other members if kept in isolation in a pitri dish.
Read the bot tavern's thread on Comesum, I think we discussed this a bit there.