My constant refrain on all the internet relationship advice is “You see that essay you just wrote? Read it to your partner.” And this will resolve the problem in one way or another in 90% of cases.
But then we also get a pretty hard selection bias as internet readers of relationship drama, in that in order for us to even know about the problem (1) it has to cause a significant emotional disturbance for OP, (2) OP has no source of trustworthy, levelheaded advice in their real life - which is already a bad start, (3) they think that the internet is the best place to go - another red flag, (4) they must be self-important enough to think their personal drama would warrant the attention of strangers, (5) the drama must be so juicy that it gets hoards of upvotes and comments so it reaches the front page, (6) it’s probably fake anyway.
So for the 5000 upvote /r/relationshipadvice post “My Trump supporter boyfriend says our free-use sex life should include my 14 year old daughter, but my cousin (her father) disagrees” - the answer is definitely “Yes, you should break up, and also go to therapy, preferably in a mental institution.”
Still better than the typical crap you see on reddit. I hate to say it, but the influx of normal/trashy people is worse than the bots. Gimme someone with enough independent thought to consider themselves a third wave communist or whatever.