John Gruber:

Their old logo was goofy. This new one is simply garbage.

The redeeming quality of the previous Google logos was the whimsy, while the serifs kept them from looking too childlike or immature.

The new logo, however, is simply puerile. Someone needs to take away the Play-Doh.

http://www.ardisson.org/afkar/2015/09/02/quoting-john-gruber/