Before switching to hybrids, I literally spend thousands of euros fixing my VW diesel that was worth maybe 10k€.
The dual-mass flywheel broke, that was 1k€. Had to do a clutch repair at the same time, 700€. The turbo started acting up, that was around a grand with all the labour. When the turbo was fixed, it clogged the already close to full diesel particulate filter. That would've been 2000€ to replace, but I knew a guy who just emptied the casing and modded the software on the car to think it was still there.
Finally a tiny hexagonal thing at the bottom of the engine broke, which prevented any oil from circulating in the engine. That would've been a 2000€ operation. Had my guy do a quick patch job with some bonding agent, sold the car.
...and that's on top of the normal wear and tear + yearly oil changes etc.
The car was under 10 years old at the time and 90% of the problems were issues with the overly complex drivetrain with thousands of moving parts, instead of just one like with electric engines.
On the hybrids I owned all the issues were in the combustion engine. On my current EV all the problems are unrelated to the drivetrain - currently the AC can't hold its coolant for more than 6 months, haven't found the leak yet.