My attitude changed a over time.
When I was very young I killed them a lot. When I was around 9 or so I stopped killing them, because I was taught that they are useful animals and they do indeed eat animals that I can stand even less, like flies and mosquitoes. Ever since I was around 16 years old and I learned about how brains, minds and nervous systems work and what suffering means, I basically stopped having any remorse for killing spiders or insects, since from what we understand about brains and nervous systems, it is extremely unlikely that they are even capable of feeling pain or any emotions on any significant level. So there is no reason to feel bad about killing them if it's for the purpose of keeping your house free of spiders or their webs, in my opinion, though I am against seeking out spiders just to kill them.
I once let a spider have its spider net in front of my window, because I thought it's useful to reduce the number of mosquitoes in the summer. One day, a few months later, I noticed that there were tiny black dots at the ceiling in the corners of my room. Turns out they're little dead baby spiders. They made small nets but didn't catch anything and died.
So having spiders around has the benefit of reducing the number of annoying flying insects, but the disadvantage of having annoying webs and, well, spiders around.
When I find a big spider in my house and I think it's responsible for or going to spin annoying spiderwebs in the corners of the room, I'll probably kill it. But I'm often indifferent, and sometimes I just pick them up and carry them outside. Although I have to carry them far, because they have an excellent sense of orientation and often end up showing up again in the house one day later.
I live in Germany where the biggest spiders are a bit smaller than a tennis ball and they're all harmless.