I never had an experience like this with my mirrorless, although I once dropped my DSLR and lost the lens.
IMHO with all cases like this it's not the size ratio of the gear, rather the care ratio between shooter and gear.
I have to correct my statement in post 2 of this thread:
On my last shooting trip to Southern Africa with my newly acquired Pana GH 5 with the Panasonic/Leica Elmar 100-400 mm/ 4.0-6.3 lens attached, the lens bajonett ring broke and bent when I took up that combo out of my belt bag. See attached picture. No unusual impact, like drop or the like.
My experience with Panasonic customer/repair service was the worst I ever had with a major camera maker:
The first "support center" (via the seller) gave me an "repair estimate" with a price tag just 5% under new price of the lens - with no specifications of the repairs/exchange parts needed. Together with an offer to sell me a new lens at about 10% less than new price.
I refused and contacted another "Panasonic support & repair center". After inspection of the damaged lens I got an estimate of about 50% new lens price as "repair costs estimate". Explanation: "No spare parts from Panasonic available yet for this lens, only exchange of the complete optics."
I grudgingly gave repair order but asked for delivery of the damaged or exchanged parts. (with the intention of getting a metallographic test of the damaged bajonet ring for an eventual material warranty claim).
After return of the repaired lens, the invoice said "Complete exchange of built group SWX0269 unit - 50% fairness"
No delivery of damaged or exchanged parts.
So it seems to me I got a new lens mount ring from Panasonic (no damage of any other parts were diagnosed) at 50% of the price of the new lens by "fairness" of Panasonic.(Europe)
Apart from MHO that an injection moulded aluminum ring is not adequate for a lens that weight I think that the service/repair policy of Panasonic is extremely customer-unfriendly. I am reconsidering my decision for that camera maker.