I am making my way through Yakuza series right now and while playing 5 I realized that I am not that invested into the game’s combat, so I turned it to easy and that just streamlined the combat so much for me. I would recommend to maybe try Yakuza 0 on normal at first and then just switch it to easy if you feel like the gameplay might be dragging on.
Usually the issue isn’t my incompetence, people just get too drunk in the tavern and decide to kill each other. FUN.
I just wall myself up inside with a gate and wait out the sieges. I also place two dogs outside the main entrance to catch kidnappers. Has the same effect without needing to mod the game or alter the settings.
Of course once I can build ballastas or make use of water/lava, I can set up winding paths with Dwarven Shotguns (basically using water pressure and garbage I can fire minecarts full of crap at high speeds) to obliterate trespassers.