Unfortunately you won't know if someone is actively using a parser or not unless they're dumb enough to announce it. Also you can't do anything about discord bots as that's out of the game. I know you say you can be a good player without one, but unless you want to crunch the math the game gives you from the battle logs there is no way to know if you're doing enough of a good job that includes fight mechanics. Yes we have SSS but clearing those just means you can finish the fight doesn't mean you can also do the dance.