1> They DID have a force intercepting them. The entire fleet behind them. They're just not rushing things.
2A> When there's no point in throwing them at an enemy who's badly wounded and bleeding out. Pursuit predation is a thing.
2B> Spotted WHO leaving? The transports? Why bother. Once they'd been informed, they could detect them and take them out with the cannons. Before they had, they wouldn't have noticed them.
3> When it's pointless and you're enjoying the chase because you're a sadist. Which the First Order were.
4> Really not a sign of incompetence, just being outwitted by Poe Dameron. And only briefly, at that.
5> You really don't get that the First Order are arrogant, do you? Of course arrogance is a bad quality. That's the point. These films aren't subtle.
To where?And why weren't they actively looking for them? They knew the people on these ships were doomed, a logical conclisuion is that they'd try to escape with smaller ships.
Again, Crait was known to be a basically useless planet, with nothing on it. Even if the Resistance DID land there, they'd starve and die, since they'd lack communications and allies to rescue them, and had basically no supplies.
More desperate than the one who's ignoring the actual plot points of the film? Because you're still doing that.That 'huge distance away' should be somewhere inbetween 50 and 100 kilometers. It's relativly hard to tell, since we don't get a sideview shot of the chase to make comparisons. Even if it is 200 kilometers, it hardly makes a difference.
If there was no light how did we see the other ships? Or the planet, for that matter? There must have been a sun, in the first place. Second: The U-55 shuttle has rather bright engines, similar t othe falcon, even though it is smaller. The makeshift cloak used for it simpy reduced emmissions, not visibility of the ship itself. Its also not exactly tiny, being 22 metres long. The sublight engine is roughly 3 metres in diameter. If you tell me you cannot see that some hundred kilometers away, you're delusional. I don't know where you live, but I'd reccomend you look up at the sky at nighttimes. I live in Frankfurt, Germany, and even I can spot the occasional sattelite orbiting earth at... what hights are these things usually? And that's trhough atmosphere, haze and dust and with light pollution. Don't try to make up sterile scenarios to try to prove your point when you have no basis for it whatsoever, it makes you look desperate.
Also, you can see satellites because of reflected light, again. And you have to be looking pretty hard, and they have to be moving relatively fast for you to pick them out from the stars.
Here's the actual shot of them being blown up;
The transports aren't bright, their engines aren't brightly lit, and they weren't flying directly away from the First Order, so their engines wouldn't be that visible either. What makes them most visible in that scene is the light from the exploding transport.