Absolutely. I was about to write the very same thing, but I wanted to take the time to go back to the episode to check Kevin's actual words.
My read on things has a lot to do with what was actually done (or said) and what the speaker's motivations seemed to be (to me). In the case of Kate relaying the wheelhouse talk where Ashton tried to shift the blame for the failed fishing excursion completely onto Rhylee, I felt like Kate told Rhylee because she thought she (Rhylee) needed to know, in order to protect herself against Ashton. There may possibly have been an element of "Hey, I stuck up for you (so, please, be my ally because I don't seem to have any friends on this boat!)" underlying it, but I do think Kate's main purpose was to warn Rhylee about things Ashton might be saying behind her back. And what she relayed to Rhylee was, in fact, the conversation that transpired in the wheelhouse.
OTOH, Kevin overheard Courtney tell Kate exactly what Brian had texted: that he first asked what she was thinking about their relationship long-term, and that when she replied "What do you think?", Brian responded, "We're just having fun, right?" Kevin even reacted to those words with, "Awkward!" But that was fundamentally NOT how he presented the situation to Brian. He started with "What's going on with you and Court?", and when Brian purported not to know what he meant, Kevin headed straight into "She's going around like f---ing saying s--t now. Like you messaged her and said, 'Hey, blah-blah-blah...' I'm just letting you know. She f---ing came here and straightaway told Kate. And now they're just like, talking to each other."
At the reunion, Kevin tried to play this off as though he only told Brian because he (Kevin) wanted the two love-birds to work out their problems. I call BS on that. I think Kevin concocted that explanation after he saw how poorly that chat reflected on him when it aired. And, I suspect that it was Kevin's attempt to put this spin on his words that riled Capt. Lee so much.
In real time, when Kevin first started talking to Brian, he may initially have just meant to get Brian's side of things, but then he immediately devolved into bru talk, presenting Courtney and Kate as the "bad bitches" and himself as just one bud looking out for a fellow bud. If his purpose had actually been to make sure Courtney and Brian talked to each other and worked it out, he could have said, "Hey, I don't know if this is what you meant, but Courtney thinks you broke up with her by text and she seems pretty upset." But that wasn't what he presented to Brian at all. He was totally being shit-stirrer.