A downbeat Daniil Kvyat said his current slump feels "never ending" after qualifying 19th for the German Grand Prix.
Kvyat failed to emerge from Q1 at Hockenheim, later asking Toro Rosso on the radio "What the f--- is going on?" after being told teammate Carlos Sainz had progressed to the next session. The Russian has only out-qualified Sainz twice in eight attempts since his demotion to Toro Rosso.
Kvyat admitted he knew the lap was not good enough to progress.
"I had a s--- session. They weren't good laps," Kvyat said. "I had a very bad lap with many mistakes. I was expecting to be out of Q1.
"I don't feel great, it's not a great period for me. It seems like it's never ending up, I'm trying every weekend so much but nothing is working so far, so it needs to be more than that."
Asked if he felt he currently had the mental strength to deal with his current form, he said: "Well it's not like I'm having the most pleasant time in the world, for sure it's not easy but it's not an excuse. Everyone has hard times, if you are good enough you come out, if you are not good enough you just die."
Immediately after his elimination, Kvyat had told Sky Sports he needed "more than the summer break" to rectify his current slump.
When asked to explain what he meant, he replied: "I don't know what I need, I don't know. I just need the feeling in the car. When it comes back it will be much better, so yeah, I can't remember the last time I had a good feeling with a car so I don't know what's going on. It seems like my working window is very narrow."