Anyone else feel like your job gets more manageable after you quit?

I finally found a new job to replace my current, very stressful, super busy, job, however, it’s like the minute I landed this new job my current job has been more and more manageable. Is it some psychological effect that I just don’t care that much now that I have a new job or am I making a terrible mistake to leave? Anyone else feel like this after they find a new job?

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