The Monegasque started Sunday’s race in Barcelona from the pit lane after Ferrari replaced the rear of his car following his complaints as he suffered a shock Q1 elimination with only sufficient time for 19th place.
Despite the changes, things didn’t improve much on race day and Leclerc was only able to recover to 12th, before being promoted one position when Yuki Tsunoda was hit with a penalty.
When asked if P11 was a decent result, a crestfallen Leclerc replied: “No. I don’t understand what we are doing wrong but we are doing something wrong.
“I went from a hard first to a hard second in the last stint, I did the exact same thing and the car behaves in a completely different way.
“We have to understand and work, but it’s been a few races now where we struggled with the conditions or with a really sharp car and today it’s not better.
Although Leclerc reported that his SF-23 felt better compared to qualifying, he was left puzzled after experiencing “completely different” limitations.
“The boundaries were the opposite,” he said. “Yesterday I couldn’t drive, I had a super loose and weird rear end.
“We will analyze all this at the factory. Today, it was above all the front, the challenge. The limitation was therefore completely different.
“The feelings were a little better today. The second and third stints were a bit better. The first stint was really bad but I think it had more to do with the tyres.
And Leclerc stressed that Ferrari needed to overcome its tire problems quickly.
“I feel like all weekend we’ve been talking with the drivers and we’re struggling (with the tyres),” he added.
“It’s such a small window and in these conditions, on this track, it seems to be more sensitive than others.
“We already know that’s one of the weaknesses and I feel like we struggle more than others. We have to be on top of those things.”