Cut the guy some slack - he pitted twice, and intentionally so on the instruction of the race engineer, to try the C3 and to avoid blue flags. I was actually watching onboard and the guy was lapping the same pace as both Mick and Latifi on the C1 before pitting again, he also visibly took the edge off in the first sector as he had 2 track limits warnings, but his S2 and S3 times are quite comparable to his teammates'. He also did realise his mistake after the blue flags debacle and moved out of the way eventually. He was told there were blue flags before, but not sure how proximal Perez was so he took the inside of T3, then moved out of the way into T4, and immediately acknowledged the mistake over the radio.
Oh and by the way Leclerc won 81% of Sauber's points that 2018 season as a rookie. Russell has never been out-qualified by Latifi, 19 races and still running. It is quite a strange comparison to the Haas F1 Team's situation, where both drivers are rookies, in their 3rd race. If the season was to end now (which it won't) then all these things would have some finality to them, the embarrassment would be cut and dry for all to marvel at and ridicule. However, the season is still in progress, there is always some unpredictability and the drivers will gain more experience and find their true pace - some take longer than others. Towards the end of the season is when judgments should be made.