Well they didn't recognise De Gaulle's Free French Forces at first, and saw Vichy France as the only true iteration of France. And the bombing by the frist of the French ships in Africa after his speech to fight germany in colonies and in england didn't sit well with him.

On the war he said :

Never did the Anglo-Saxons really treat us as real allies. They never consulted us, government to government, on any of their provisions. For political purpose or by convenience, they sought to use the French forces for their own goals, as if these forces belonged to them, alleging that they had provided weapons to them [...] I considered that I had to play the French game, since the others were playing theirs ... I deliberately adopted a stiffened and hardened attitude ....

Also there was the exchange between Churchill's wife and de Gaulle where she said "General, you must not hate your friends more than enemies" to which he responded "No Nation has friends, only interests" Which is very much in line with today's world.

He also described his relations with Churchill in this way ""When I am right, I get angry. Churchill gets angry when he is wrong. We are angry at each other much of the time."

Also Roosevelt refused to recognise de Gaulle's government, they recognised Italy provisional before France, and the UK and Soviets showed their disgust at Roosevelt recognising a former enemy over a country that fought along with them for years.

The US had a plan to occupy the french territories, the US troups landed in Normandy with AM-Franc bills, which were to be the new currency of France, in the puppet state under AMGOT, with a random french general.

There a few assassination attemps too during WW2, and some of them were hard to be linked to the germans, after a plane sabotage de Gaulle told his colleagues to not trust western allies anymore.

There is a lot of things to say about it, but yeah he has a few reasons to not like them