Is it just me or is the amazon seller central website extremely slow, unresponsive and buggy?

I’m a new seller. I’m comparing Amazon to Shopify and Shopify is so much more user friendly and faster! In Amazon, everytime I update or delete an SKU, it takes 10-15 minutes to show the changes (on the dashboard, on the listing) whereas in Shopify it’s instant. Sometimes it doesn’t even work. Everytime i update anything on the listing, for some reason, I also have to update the list price, dimensions and weight all over again. SO annoying! This can’t be normal, right???