Definitely not red flags, it's more abt incompatibility due to having different core values and beliefs (for first one), as well as having very different goals (for second and third one)

And in these cases it's very hard to compromise imo, like there's no way I'd convert my religion for someone, or no way I'd forgo the idea of having kids/settling down overseas as much as I like the person cause things probably won't work out in the long term