Even though uneven floors and legs don’t seem to be the cause of a wobbling desk, the second or third reason must be true. The connection between the legs and the tabletop is not strong enough, or the legs themselves are not stiff enough (and the larger a table is the more important both of these become).
This wobbling seems to happen between the metal leg, the metal bracket, and the bolts IKEA gave me.
Like the SJUNNE, the tabletop already has holes for the legs, so it was easy to put them together. But when I type or just bump the table, it shakes, which is very annoying. This must be solid.
I seem to be having trouble with the table top and legs I bought from IKEA. This is the link to the page in the IKEA catalog where I bought the tabletop: http://www.ikea.com/us/en/catalog/products/50106773/ These are the legs that I bought: http://www.ikea.com/us/en/catalog/products/30177912/
If this happens with another desk, your floor may be uneven (not the carpet). (You didn’t say if the four legs on the desk were all the same.) Turn your desk 90 degrees and look. If the shaking keeps going in the same direction, it’s the floor. If it goes toward the desk, it’s the desk. In either case, you can adjust the GERTON by loosening one of the legs in the direction that makes it loose, pulling it out until it fits snugly, and then tightening it again. Because the adjustment marks on these aren’t very accurate, you may have a tolerance problem if you set it to line up exactly with the marks (where one leg is marked shorter or longer).
Last year, when I tried out the BEKANT standing desk on display at IKEA, it wobbled (in my opinion). The same kind of wobble was shown by a YouTuber. People have complained about the shaking in this thread. 
Desks and chairs for homes must be tested to make sure they are comfortable, safe, strong, and will last a long time. We test our desk chairs more thoroughly to make sure they meet our high standards for stability, strength, and durability. For example, the seats can hold up to 300,000 times of strong loads. Home desks are tested for stability, strength, and durability, among other things. The kind of tests that are done depend on how the desk is made and which parts are expected to get the most use. Office desks must undergo more stringent tests than home desks. EN 527 and ANSI/BIFMA X5 will be used to test the stability, strength, and safety of desks that meet these requirements. For example, we could test how long a product lasts by putting 100 kg of vertical force on it over and over for 10 seconds.
People who use standing desks often think that all standing workstations rock back and forth. Why does this thought come into my mind? because most standing desks rock, When we look at the industry as a whole, we can see that cheap standing desks have been the most popular over the last two or three years. People think that all standing desks are unstable because most of them move when they are picked up. If they are built and used correctly, standing desks don’t have to shake. Let’s look more closely at the top six reasons why a standing desk wobbles and how to fix them.
During this long COVID WFH time, it’s been hard (okay, maybe that’s an exaggeration, but whatever) for me to find a good workstation setting. I had a project table that was too high, but with a keyboard tray and my chair raised to the highest position, it worked for some home work. When I realized that we wouldn’t be going back to work for a while, I started making changes to my space. It was easy to find a Steelcase Leap v2 chair and fall in love with it. For workstations, not so much. I bought a 60×30 Uplift standing desk after the project table. Even though I was at the top of the adjustment range because of my height, it works fine when I’m sitting but too much when I’m standing. I’ve decided to send the desk back because it seems silly to spend $1000 on a standing workstation to sit at. It wasn’t as sturdy at home as it was in the store, so I replaced it with an Ikea Bekant. Everything is crowded, and I don’t think the desk is made for the way I want to set it up. I want to change it, but I don’t know what. What desks have you used that you like and, most importantly, are strong? This is when you come into play. I’m looking for: fits monitor arms that clip to the desk; if it makes a difference, I’m using a twin mount to hang two 24-inch screens. Workstream for Monoprice Not sit/stand; adjusting the height is helpful, but not necessary. 30″ +/- 3″ tall 60″ +/- 6″ length It wouldn’t be a deal-breaker, but it would be good to have some way to organize the cables. I like simple designs, so both of the desks I’ve bought have had a top, two legs, and wide feet. Will try to keep things from getting worse.
Anything that fits between the desk leg and the floor will make the desk steady and fix it quickly. Some tools that can be used to level things are rubber erasers and cork bits. To stop the problem from happening again, just glue your wedge shut.
Work on a solid, steady surface to avoid distractions and get the most done. Nothing is more inconvenient than a table that wobbles because it isn’t level. This has happened at some of your favorite restaurants, which is annoying and takes away from how much you enjoy your meal. Think about how a wobbling standing desk can affect your office.