You can practically snooze through shinryuu. He is easier than Susano in that aspect. The only danger a player faces is tidal wave at the start of the fight, when he dives to the corners and you have to get to a safe spot, and chains. Furthermore, all of this is telegraphed and two of which are not new mechanics in the slightest. If you die to these mechanics then it is on you as the player to ask why. In most parties, many will answer you or even type out the fight as it happens. I do this on healer all the time, shinryuu is just not that threatening.

What it sounds like to me is you want another thordan fight which i think is insulting no matter what your skill level is. Also I've seen some stupid party disbands in my time in this game, so saying we should nerf something bc a bad experience by some is not a smart move in the slightest. It robs future players of a challenging fight. Sorry op, you and everyone who thinks like you need to pull up your big boy pants and try to seek a solution for yourself. Whether that be advertising in pf for help or asking for directions during the fight or after a wipe. Coming her to ruin content for everyone is just the textbook definition of entitled.