What makes Macbooks better than Dell laptops?

Hello everyone. Mac newbie here.

My name is Ken. I'm a 25-year-old grad student studying chemical engineering, at the same time working part-time as a laboratory technologist.

I've been using PC laptops ever since high school. However, most of the PC's I owned in the past would end up becoming deficient in overall performance. Now, two years ago, I purchased a Dell XPS 13 from a Microsoft store. At first, I was fine with it. But, within the past couple of months, my Dell XPS started acting up and demonstrating inadequate performance. For some reason, it has these little quirks, such as randomly locking up on me.

Therefore, I've made the decision to dump Dell and purchase my first Macbook.

According to detailed specifications, the Dell XPS 13 is lighter and slimmer than Macbooks are. More significantly, the Dell XPS 13 has a better processor, and has a higher-resolution display than Macbooks do.

Yet, I've become frustrated with PC's over the years, and I'm now turning to Macs.

So I need your opinions, guys.

In terms of performance and reliability-

What makes Macbooks better than Dell laptops?

What advantages do Macbooks have over Dell, given the XPS 13's aforementioned specs?

I look forward to hearing what you have to say.

Thank you guys.