If you've been through three styluses, I'm leaning in the direction of your heavy hand doing damage to your pens.
If you've used titanium nibs in all of them, then your heavy hand could be jamming the nibs too far into and damaging the recessed end of the nib silo which causes your problem.
That said, the pens aren't weak. Your issue is pretty individual, and you'll likely do the same damage to any pen you use.
What I suggest therefore is that you buy cheaper pens and don't use titanium. If you're putting enough pressure on the pen to damage its internal components, you're also going to eventually damage your screen using the harder nibs if you haven't damaged it already.
A couple less expensive options on Amazon below. I've not tried any of these myself, but compatibility with the rM is claimed.
- https://www.amazon.com/NibtouTech-Artist-EMR-Stylus-Pressure-Sensitivity/dp/B0C6NNYM88
- https://www.amazon.com/Remarkable-Pressure-Sensitivity-Rejection-Anti-Slip-Texture/dp/B0CDC6VRC6
- https://www.amazon.com/Libreath-Remarkable-Replacement-Rejection-Compatible/dp/B0CBJLFJ7Z
- https://www.amazon.com/dp/B086N4KK7Z
- https://www.amazon.com/dp/B0728HBD7F