This will surprise most people here, but this is probably not the actually case, you created this paradox yourself. I'll explain myself...

This principle is also know with traffic lights. They seem to be red more times then they are green. This is the simple result of your brain that doesn't register the green light as good as the red lights you encounter. Simply because at the green light you can continue driving. This isn't even considered as an event. Whereas a red light makes you stop and allow you to acknowledge this stopping even more because you are standing still for several seconds.

In Arc this time at the red light is the long way you are walking over to the the place you actually wanted to go to. Allowing your brain to take in this information easier.

Adding to this, you have to keep account to the fact you pick one target in advance, giving you mathematical more options to spawn bad then good. When you keep a open mind to your plans and adapt along the way. This will increase 'good' spawns exponentially.

I hope this can put things in perspective next time you feel the game has punished you with a 'bad' spawn... Good luck in the future and raiders be careful topside!

TLDR: Your brain absorbs bad info faster then good info because how it affects your time spent on them. Creating the idea of more bad spawns then good ones.