You are right to give up on Peppa Pig at A2. Children's cartoons are not designed for language learners; they are designed for native-speaking children who already have a huge vocabulary and can handle fast, exaggerated speech. At A2, you need content that is deliberately slowed down and controlled in vocabulary, not a show meant to entertain five-year-olds with silly voices and rapid dialogue.
The common advice to watch children's shows early is misleading. While those shows use simple grammar, the speech rate is often native or near-native, and the voices are cartoonishly pitched, making it harder to parse sounds. For Mandarin especially, the tones can get distorted in exaggerated voices. Instead of forcing yourself through Peppa Pig, switch to content made for learners. Graded readers with audio, learner podcasts (like those labeled for HSK 2-3), or YouTube channels that speak clearly and slowly about everyday topics will give you far more comprehensible input. You can also watch short, silent clips with subtitles in your TL, then rewatch without them.
A better approach: spend 80% of your listening time on material where you understand 90-95% of the words. This builds fluency without frustration. The remaining 20% can be harder content, but only if you enjoy it. If you hate Peppa Pig, drop it. Your motivation matters more than any single method. Try news in slow Mandarin, vlogs about cooking or daily life (many are spoken clearly), or even audio from textbooks. Over time, your ear will adjust, and you can revisit cartoons later at B1 or B2 when the speed and voices won't feel like torture.
Concrete next steps: find a podcast like "Slow Chinese" or "ChinesePod" at your level, use an app like DuChinese for graded reading with audio, or watch a simple travel vlog where the speaker talks at a measured pace. Set a goal of 15 minutes of easy listening per day, not 30 minutes of pain. Progress will come faster when input is comprehensible and enjoyable.