They're definitely not rumours, I can confirm that. I've been specifically avoiding Fiats with between 70,000 and 90,000 km because that's the window when they need a lot of fixing up. The yellow one only had 27,100 km which would have given me time to enjoy it for a couple of years and sell it off at 50,000 before it started approaching the failure zone.I'm no expert and never driven one, but haven't heard flattering things where their reliability is concerned.
The Veloster might already be out of the running. Everything at 2017 and below has that horrible looking V shaped console. Hyundai only replaced it with something decent at the 2019 model year. Those cars will be pretty expensive for a while until the depreciation finally kicks in.