Those Dell ones that come with the XPS caused us endless problems at work. Higher res screens would just not work properly. The only one that consistently just worked was the apple HDMI/USB-A/USB-C charging dongle.
Sounds to me that you for some reason got the older USB-C 3.1 / Gen 1 docks those are limited to 5gbps which means no 4K@60 the Gen 2 USB-C / TB3 docks work quite flawlessly as long as you ofc plug them into a Gen 2 or TB port…
I've been running an Intel MacBook Pro (last intel version I think) on it the last few months with 2 external HP displays, keyboard, mouse, and it is a solid performer.
Yes, those displaylink docks are fine for office productivity work, but not that suitable for gaming or media consumption because of the cpu load. On the other hand, I plugged my m1 air into one at work and the cpu load was reasonable even while videoconferencing, so I suppose eventually the overhead of displaylink gets small enough not to be a problem.
As another commenter stated, bleh to DisplayLink.
Also, what monster designed it so 1! of the 4 USB-A ports is upside down? This is why we cannot have nice things.
