
i dont think its about appreciation. idk how to explain this. i think you just need to communicate with her and find out each others love languages and what she likes and what she doesnt like. thats one thing i never did with my ex and it ultimately ended our relationship. communication is the most vital thing you can do here, instead of just leaving questions unanswered.
ive been where you are. ive been where she is. literally i was in the same exact situation with my ex. we kept bickering and it felt like he was picking a fight over every little thing. had me stressed out for MONTHS. so i was the one who ultimately had to end it bc i had enough of him not feeling like i was doing enough. i felt drained. maybe ur gf feels drained too. so i think the best thing here then is to end it. i had to go through the same exact thing. i was with my ex for nearly 4 years.
but in the end it was better i ended things when i did, bc the relationship was adding more stress to my life than it was taking the stress away. maybe ur gf is just stressed also and needs you to give her space and not make her feel suffocated. idk for me, my ex made me feel super suffocated and like i had to cater to his every single need every second of the day, and it was just too much.