Your best solution is to use Chrome, Safari, or Edge: none of these crash while running the site. Edge, surprisingly, is the fastest with Discourse, according to the last tests I saw.
There isn’t much we can do to inhibit the infinite scrolling, and it’s not really an issue. If you use the slider it isn’t an issue at all.
As to the text on individual buttons, we average about 20 topics and 200 posts per day, so it is hardly an issue.
Have a look in #user-guides-and-how-tos, and run through the interactive tutorial.