You most likely have a weak WiFi signal - how your computer connects has nothing to do with it. I’m sure you’ve been sent a series of things to try - but as you don’t talk about trying anything I’ll point you to this:
Try all the things, in order, and let us know how each of them goes. The staff can test from the back end whether your connection is weak, but it’ll take them a day or so to respond to this open ticket.