You want to claim it's substantially slower than before. Do you have data to back that up ? If it's based on your personal anecdote, my personal experience is that the speed stayed roughly similar. It has become more "cluttered" with lots of extra stuff - images, knowledge cards, list of items, maps, etc. But the page load speed has been mostly similar - fast enough, though not quite instant.

When they first launched the search-as-you-type, it did feel instant but then I don't search on google.com anymore but use the chrome url bar.