No, it’s really not (unless you mean the literal, holistic user experience and not what the term usually refers to). GIMP is lacking the tools and integrations

No, it’s really not (unless you mean the literal, holistic user experience and not what the term usually refers to). GIMP is lacking the tools and integrations that make Photoshop seem like magic, while not being more performant or offering much of a benefit beyond being OSS. The lackluster UI is just the cherry on top.