I see two problems with their approach:
1. The product is not built with the 'grandma test' mindset.
More sliders and widgets is not what your grandma wants in a search engine. This is why building a search engine is hard. You have to guess with very little information what the user wants and get it in front of them at first try, without the user having to tweak anything.
2. Google must not fall because it is a monopoly. If it was to fall it should be because someone built a better product.
Similar to how ICE cars had "monopoly" over transportation and the time for change has thankfully come. Not because monopolies are bad, but because electric cars are so freaking awesome.
Google perfected what the 'best search engine' is to 99% of population. This comes at an expense of really annoying 1% of users but it is the price they are willing to pay. To de-throne Google you really need to cater to broad population with a product that will be better both at capturing intent and delivering and presenting relevant results. This may or not come with a different business model.