Isak spoke after a first appearance for the season in Sweden's World Cup qualifying defeat to Kosovo last night.
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The striker entered the pitch for the final 18 minutes of the tie.
Afterwards, Isak said: "Not everyone has the full picture, but that's something for another day.
"I can't control everything that's said or written. But I'm happy that I became a Liverpool player."
Isak had three shots - two on target - and was booked for clashing with Kosovo's Fidan Aliti.
"It's great that everything was settled before the camp and that I could focus on playing football again," Isak said.
"It's been a fairly new situation for me, but you always learn and develop mentally off the pitch as well."