I think maybe TNT shouldn’t be able to destroy your own team’s blocks. Or maybe a vote to kick option for players
Over half of the time when I play Capture the flag, there’s someone on my team exploding the defenses around the flag or breaking them by hand. I don’t know if there’s a way to fully prevent it, but if tnt could only break enemy teams blocks, or maybe only be able to break your own teams blocks a certain radius away from the flag, I think it would reduce the amount of self sabotage