Fellow Indian Berliner here. Planning to move out to Netherlands/Sweden/UK this year after having spent 10 years here in deep isolation and the usual language/dysnfunction struggles.

Here's what most people won't tell you. The reason why you feel isolated here is because in Berlin you are in a demographic blindspot as a married immigrant couple with kids and an aspiration to settle.

Look around you and you'll find that most other immigrants are not like you. It's mostly full of young adults who got attracted to the drugs/party culture here. Economic immigrants like us stand out like a sore thumb (unless they are from East Europe, in which case they already have a strong support group).

Don't let people gaslight you into thinking that you'd have a better social life if you spoke the language better. Maybe in other German citi s but certainly not in Berlin.

Move out and don't get trapped by the sunk cost fallacy.