This refers only to HOMAGE TO CATALONIA.
I have long had an interest in the Spanish Civil War, perhaps because, fifty years ago, I saw a man pulling a wooden plow across a dusty field from a train to Barcelona. I also have a great respect for Orwell's work and share his sympathy for the working class.
In this volume, he recounts his experience as a member of POUM (Party of Marxist Unification), the revolutionary socialist-anarchist wing of the parties fighting against Franco and fascism and for the Spanish government. The pro-socialist side of Orwell is well masked in the US by the focus on his anti-Communism. That, however, partakes of his general distaste for fat cats and elites; certainly, this book reflects his distaste for capitalism/capitalists whom he saw, along with the well-entrenched RC church, as oppressors of the workers; Spanish poverty provides the backdrop for Orwell's service and sympathies and his fear and hatred of fascism comes across clearly, even to a closing warning to the dozing English (He wrote the book in 1937 right after returning from Spain.).
The descriptions of the streets of Barcelona at the height of Anarchist power, the leveling effect on society, the ability to operate effectively without the traditional hierarchy are matters of wonder and for praise. The experience on the front lines is gritty in its details and reflects the poorly equipped situation of the troops who were organized on a socialistic basis--same salaries (poor), same uniforms (raggedy), and so on. Orwell makes the point that the unit functioned well despite its lack of traditional ranks, etc.
Besides fascism, the "bete noire" of the book is international Communism which did not want a revolution and so helped to crush POUM through its press and its aid to the Spanish government which forced it to be compliant with the demonizing of the anarchists, something easily accomplished in the Western press. The Comintern had done the same thing to its own in China in 1927, and so this kind of betrayal was a practiced affair. Also, because of the anarchist/communist element in the war, the Western democracies stood aside, leaving the government to fall to Franco.
Altogether, it is easy to see and to share Orwell's unhappy frustration with his experience, his awareness of the international situation, and, with perfect hindsight, storm that was about to break.
Of course, the book is written clearly and sorts out the complexities of the political chaos that sapped the strength of the pro-government forces; there is some repetition, but the complexity and the front/behind-the-lines locales make much of that necessary.