What is the context here? What kind of overall object is this? You probably don't need to merge the handle into the surface. This is creating a lot of extra vertices, and is pinching the surface. You can just float the end of the handle above a simpler surface. Same with the end of the trim at bottom left. The trim can…
It also depends on how polished the surface is going to be . Those shading gradients/artifacts could be compensated by synched normal map , not 100% perfect although. So if it's dirty or rusty surface with a lot of small bumps /normal map noise , it may be ok . If it's shiny metallic surface even synced normal maps would…