Yeah at that point I'd just go for another 10 year old car.
My last car was a Volvo S40, had really nice leather interior, nearly full option and cost me €2000.
I only had a few brake pads an a broken trunk cable to deal with (super common issue on this model), the latter I did myself for €40 in parts. Ran great for years. But yeah there's an element of luck also.
My previous car was an Octavia, that had more issues. Electric window broke and I replaced it all myself. But it was a pretty nasty job. Eventually the gearbox started whining and when I brought it to the shop it basically blew up. But it had served me 5 years at that point. Cost me €1200 to buy.
More like every couple months on the road, from my experience in having driven one. Just this year here are couple of things that have occurred:
>glowplugs burnt out
>air-mass sensor failure
>faulty abs-sensor
>fuel nozzle malfunction
>brake failure
>engine back support failure
>short circuit after worn-out manufacturer divider causing massive sparking, heating and a drained battery
Some additional fixes identified recently not yet fixed:
>faulty brake booster
>moisture buildup(?)in door mechanisms leading to it sometimes not opening from inside
>rust buildup in some parts, needs replacing before reaching important bits
>transient misfire/spray/clog on acceleration leading to computer shutting off engine power