Replit is unusable!

I bought the paid version of Replit as I needed to modify a Replit app my colleague built, but I struggled to even get basic changes made, as it took forever to upload screenshots to the chat, and kept hanging to a point where for every single change, I had to open the chat in a new tab and just hope that it wouldn’t hang. This doesn’t happen with Lovable or v0. What sad infrastructure is Replit built on?