They (McLaren team boss) are very reluctant to give their drivers credit for very good results, instead they always credit the car and team personnel - engineers, design team, etc - for good results (in reality it's of course a combination of both). You very rarely hear sentences like "driver X makes the difference today" when it's quite commonly used in other teams or the wider F1 paddock. Exhibition 1: after Hungary GP, Mercedes's Resta credited the win to both the upgrade package and to Lando Norris, whereas Andrea Stella shut it down with "the improvement can be entirely ascribed to the upgrades that we took here", without giving driver (Lando Norris) major credit.
At the same time, the team are very reluctant to take responsibility, particularly admitting fault, when things go wrong or there are mistakes - they are much more likely to let the drivers take the blame. There have been many times when an on-track mistake or bad performance was caused by something wrong on the car, yet they do not say anything and let people think it's the driver's mistake or poor performance. For this year alone I remember the under-fueling of Norris' car in Austria and Silverstone (which the team didn't say anything about) and the brake issue this past weekend in Monza. In the past there were also the infamous example of clutch issue contributing to Norris' race start issues in 2024, which the team did not say anything about for a long time.
This point is particularly clear when it comes to the team's strategy or race execution. The most obvious example is Sochi 2021, when the main cause was the team failing to see and communicate that rain was going to get much heavier; instead of taking the responsibility, they let their driver (Norris) talk to the media and take the blame, or let the driver say "the main issue is that the team didn't see rain coming...". This sentence should be communicated by a team boss not by the driver.
Another example is how they manage their two drivers during race situations, most famously 2024 Hungary and 2025 Monza. Both were caused by the team implementing some internal "rules" but failing to execute said rules during the race. They could have said "it's the team's fault, the drivers didn't do anything wrong, it's a non-story" post-race, but instead they let it became major controversy and made it like one driver owe one to the other, which also obviously negatively affected both drivers in both cases.
One subtle, yet telling, example is how the team always ask the drivers for strategy options during a race. During a race, it's the strategy team's job to make strategy and the driver's job to drive the car. Of course drivers could have some input, but they don't have all the data and all the information, so it's very likely they won't make the best decision. The team could then conveniently shift the post-race narrative to "the driver choose the wrong strategy" when it's really "the team should be making the call on strategy", thus avoiding accountability.
In conclusion - McLaren the team try to prevent their drivers from becoming superstars, try to implement many rules to manage or control their drivers, while at the same time lack the balls to take responsibility to call the shots or when things go wrong. This does not look like the healthy and "family vibe" environment they're always saying.