I use google only because I already have a lot of data going around and it would be a pain to move to alternatives.
Using:
google docs - script writing (very useful, helps working in a team, because of its sync)
I do not use google chrome and there is one reason: Firefox. It's faster, more secure, does not collect data (telemetry can be turned off with some tweaking).
Gmail - planning to move to an alternative (Found Tuta, want to try)
I used android, very customizable and piratable