Lu Bu is just bad game design
It's not even that his attacks are difficult to deal with, as he does them over and over and over. Its that he is a huge damange sponge. The whole fight drags on for far too long. Something that should have been caught in playtesting. But, as with all souls like games, bad design choices get a free pass. The fanbase laps this shit up and just says "skill issue" thinking that's a meaningful statement, it's not it just shuts down discussion. I'm kinda bored o fthis. Wo Long is a great game, it didn't need to be ruined by such a boring tedious fight. Half the length and you'd have had a fun boss fight. But no, Team Ninja, again, embrace stupid difficulty spikes and the audience goes "skill issue" or "its a a skill check", whatever that means. Sigh, remember when games were fun and could just be enjoyed?