There's nothing saying cheating is good in the this. And honestly yeah, cheating is kinda weird to be on this, but I think it's just a statement saying "this is a type of relationship, a type with one person cheating on the other." It's as neutral towards cheating as it is towards anything else.
If we want to nitpick, "open relationship" uses the word "affair" which has a lot of negative context, and so open relationships must be bad right? I don't see this as endorsing anything.
Look, I think it'd be better without the cheating bit. I'll give you that it's definitely a weird inclusion. Pretty sure I already said as much to someone else, if not directly to you. The rest of it, though? There's a lot of nit picking and stretching to make it at all misogynistic or incel related.
As for imagery, I think we're interpreting different things from the symbols. The broken heart and the frown represents not being in a relationship, despite being in love. The sunglasses aren't supposed to represent coolness, but sneaking around, being 'shady'. Overall could it be more clear? Sure. Could it just remove cheating and be a lot more agreeable? Sure. But with just a bit of contemplation it's really not saying anything unreasonable.
I'm sorry but you simply don't seem to understand how imagery and symbolism works.
The artists intent is very clear. You are trying so hard to defend this random dumb comic strip on the internet instead of just admitting it's a dumb comic strip on the internet.
seriously, the last thing - relationship anarchy, is very rarely (if ever) supported by incels/misogynists in general, because they want control over women. relationship anarchy is very much not about control. if we're to say that the imagery is indicating which is better, it probably would indicate relationship anarchy is best - given the whole everyone is smiling and look at all those hearts deal. not to mention, as the other commenter said - the shades indicate shadiness. there is a distinct air of it being bad in the long run to both scenarios in which secrets are actively being kept.