The house was built only 5 years ago. There were several hairline cracks after 1 year as the house started settling and the builder patched them, but more cracks have appeared since then.
I am very new to owning a home and have little DIY knowledge. I was going to start looking up youtube videos on fixing hairline cracks, but this one makes me think that I might need to hire a professional drywall repairer.
Here is another one that does not look as terrible, but still worse than the normal hairline cracks. This one is on the wall adjoining the stairs. The crack extends upward quite a bit in a straight line but is very thin towards the top.