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If you won't be grateful for what you have, you will surely have anxiety issues and you are not at peace with yourself. Just accept the fact that you can't change your situation so abrupt. If you are not happy with your living conditions, then, start changing it by taking the first step to get out of your situation. Make a plan and slowly realize your things.
Your guidance is also very wise and excellent because it leads to the awareness of remaining grateful in any situation for everyone. However, some people who are ungrateful for their current circumstances still exist, making it difficult for them to find peace in their lives, even though they will eventually realize that being too greedy and forgetting to be grateful will not bring any good to us. That's why I strongly agree with your guidance, because in reality, everyone wants to change for the better after realizing their past plans were misguided or not working well for them.
Being grateful doesn't mean accepting the current situation, but rather striving to achieve something better. That's not greed, it's more about wanting to change what's happening, and that's also a key aspect of gratitude.
I think everyone should be grateful, but we shouldn't give up. That's what makes us strive for better.