Laggy and unneeded animations

BetterF3 may help some people navigate the F3 menu through colouring different items but I find the colouring just reduces contrast on many backgrounds and makes it harder on the eyes.

By far the worst part about BetterF3 is the performance, text rendering in Minecraft is already unoptimised but pulling this menu up can genuinely reduce you from playable FPS to an unplayable slideshow, especially on older machines. This is made even worse by the fact it animates sliding in and out which gets really choppy and slow at low frame rates which means it can be even harder to diagnose why your frames have dropped because it takes ages to even open the F3 menu.

One advantage of this mod is the ability to customise the F3 menu on versions before that was possible, and I have seen packs such as Raspberry Flavoured make use of it to lock coordinates behind items. This is a niche use case however.

If you really struggle to read the normal F3 screen, maybe get this, I wouldn't recommend it to the average person though.