Bloodstained on Switch; River City Girls on Switch. Both had bad technical performance and I had prioritized the potential for handheld play by going with the Switch versions, and mistakenly assumed that both games would be just fine on Switch hardware. I later got them both for other platforms and enjoyed them.
With Dark Souls 2, I was initially really disappointed in the visual downgrade, got over that, and then came to not really enjoy the game at all. I had bought the game on day 1 for both PC and PS3 — since at the time, my friends had very much broken into Dark Souls and they were split between PC and PS4. I was wary that the PC version was gonna be bad, which it thankfully wasn't anywhere near as bad as Dark Souls 1 PC at the time. But, I just didn't really enjoy the game so my double dip felt regretful, and I would have been disappointed even if I had bought just 1 version.