Try making an account on another server, maybe one of the smaller ones. My first was on lemmy.world, but on this new account on aussie.zone everything is loading much faster and I'm having no issues when it comes to commenting.
I feel bad when I see people have duplicate replies. Their duplicates get downvoted and I've seen people act demeaning as if the repeated comments were intentional. Meanwhile Lemmy and its apps are developing so bugs are going to happen.