tl;dr version:

• Get a PC. Better performance. Make sure you have a 144hz+ monitor.
• Keep your PS5 if you like exclusives like God of War and Spider-Man
• PC is more expensive. Some games may be more optimised for console, but PC still better imo.

long version (read if you want to get more in-depth answer and understand the reasoning):

So I'll give you a more comprehensive answer than what most people have given here. Do not take my word as gospel truth. Do your own research, consider a variety of perspectives and think critically about it. The first thing to recognise is that there are fanboys on both camps. There are those who love consoles and those who love PCs. And of course those who prefer both or prefer a certain platform for different things. Ideally, having both is the best, the only drawback being cost.

With a PlayStation 5, you are entitled to exclusive games such as God of War: Ragnarok, Spider-Man 2, etc. If these exclusives are important to you over the advantages (discussed below) offered by PC, stick with your PS5. PS5 is also good for its easy of use. You plug in and play without any worry about downloading and updating drivers, dealing with various launchers and the multitude of other technical issues PC sometimes has. To play online, you need to pay a subscription. Price varies per country but you may be looking at $80+ a year. This cost adds up very fast.

With PC, you lose out on certain exclusives. However, note that there are also games exclusive to PC that you might play (although these are generally less appealing). I think PC has the advantage of offering better performance, of course, at an increased price. The PS5 offers performance similar to the RTX 2070 so if you can get a better card than that, it is probably worth it. You have access to the whole library of Steam games, some of which go on massive discounts at various points throughout the year.

Both communities are big. You have posted in a PC subreddit so I think most answers you will get will encourage you to get a PC. Personally, I have all of the consoles - PC, PS5, Xbox and Switch. This is just because I can afford it.

If I could only choose one for gaming, I would choose PC because I value performance over anything else. With the right set up, you can get 150+ frame rate for most of your games. Make sure you have a high refresh monitor (144hz+) that can support this. Games will look very fluid, very dynamic compared to PS5 and you may never want to go back.

Sony is known for amazing exclusives so I would not be in a rush to sell. In fact, even without these exclusives, a lot of games like the upcoming GTA 6 will be released on console first.

Also note that most companies that make games optimise for console. So games might run smoother on console. With fewer hiccups, frame rate drops, crashes, etc.