Make the landing page a clean experience with no alteration of standard scroll behaviour. It's unusable for me, so as a demonstration the first thing it tells

Make the landing page a clean experience with no alteration of standard scroll behaviour. It's unusable for me, so as a demonstration the first thing it tells me is: I can't trust any of it will function well. Instead, were I to discover a bit later after exploring the site more that one particular thing wasn't working, it'd be easier to forgive. But, as it is now, it creates an instant wrong impression, and with no way to explore to rectify it.