I tried switching to DDG three times over last 6 years, and I always move back after I end up adding !g every second time when searching because the results are outrageously irrelevant. DDG does not understand me as Google does, bad or good thing it might be.
Even when DDG does well, very often I'll still add in a second search with !g in case Google has an even better result. Some searches have one answer (what's the population of Paris), whereas some searches have multiple answers and you want to pick the best result(s) (how to do x).