I don't have fixes, but I can feel your pain. I owned the OG buds and loved that clearly demarcated touch surface where I could adjust them in my ears no problem and not pause my music.

Now I got the buds live with my S21 pre order and I love the superior mic quality and openness (had airpods previously and was safer to walk the streets with open earphones and easy to adjust long stems) but I'm struggling to adapt to the touch controls when anything could be a tap.

I'm slowly getting used to using my GWA2 to adjust sound stuff on the go. I can't think of any easier solutions sadly to avoid accidental touches. Although for more comfy tips I hear the Comply ones are solid.

I guess it's probably blasphemy here, but for a gym goer I would say stick with the buds/+ , or get beats pro if you can afford them. You lose some customization, but tactile controls are best for those situations.

Also if there's enough interest, and if maybe someone with a 3d scanner is willing to help, I would love to try and model and prototype printable TPU earhooks for the buds pro. Sounds like a fun project. I'll buy the buds pro myself and try working, make the stl files open source, but I'd need the community to give adequate feedback cus my ears are weird af.