When placing the remote mesh point, you don’t want it at the far point where you need the wifi, you want it closer to the base mesh so that it gets a good signal from the base and also so the item that needs wifi gets a good signal from the mesh point. The way you describe it makes me wonder if some placement change could help.

Unless you’re willing to run ethernet - which would be the optimum choice - you might consider a better mesh system. If so, I would do another post on the sub, and title it “looking for replacement mesh for [your mesh model]”.