Yeah so some of these couples are jokes and only "ships" in the fandom way. But you're wrong if you believe there wasn't any kind of special relationship between Robespierre and Saint-Just, Carnot and Prieur, Barère and... a lot of men. Yes, Carnot and Barère were married. Carnot loved his wife. Barère had several female lovers. Prieur had a long-term relationship with an older woman (who was married to someone else). But um... Did you forget bisexuality exists? Or homoromanticism? Or are you just de facto implying those aren't "real"? Have you internalized that they aren't real maybe? Because trust me some men love other men as much as women, as much as their wife, maybe more than their wife. David loved Drouais more than his wife - and no it wasn't "fatherly love". It was a teacher's/mentor's love with all of the ambiguity this involves when you remember they were artists and what the subjects they preferred to paint were. This culture offered a convenient pretext where you could blur the lines. And no, you'll likely never know the truth. You'll never know if they fucked other men, or how, or what positions they preferred, or if David actually fathered his own children. And honestly it's kinda creepy to take it beyond mere speculation and actually really want to know that far as if it was a fact you were owed to? You don't need to know those details. You can just know when there's obviously a loving relationship going on. That's just as true for living breathing beings you know btw. You'll never really know what kind of loving relationship they have unless they choose to tell you... or someone forcibly outs them, which is gross.
Maybe we should be happy they had the chance to live in a brief period where all loving relationships between men weren't automatically seen as "scandalous" and "depraved", that men were allowed to love each other without it being always perceived as "suspicious" and "illicit".
Barère's thoughts about Saint-Just aren't creepy because they're about another man - they're creepy because he clearly sounds jealous of Robespierre and, you know, the whole Thermidor thing and all the nasty things he said about both. But it's actually quite special that we get to read his obviously non-straight non-normative thoughts so openly. It's not "subtext" or our "fevered deranged imagination". It's just there. Your denial isn't my problem to deal with.