I am losing nearly everything

Today I lost 90% games on online chess servers, even though, I played with not so strong opponents. I am doing one blunder to another, and I see nearly nothing.

Can this be the consequence of the fact, I am playing too much 1 minute games?

Maybe. Maybe you just need to take a break. I NEVER play a move in correspondence chess if I'm not feeling confident. There's no hurry. As for live chess, just relax, stop playing, maybe read a chess book. That usually helps me on a losing streak.

I find that when i take on too many online games i make alot of blunders if i rush from one game to another.

I know how you feel.  Finally reached 2k rating on lichess.org before I went to sleep last night but in a very small amount of games this morning I'm already back down to 1901 >.<