I had a 530d touring a while back. I ended up spending £5k in 18 months of ownership on repairs and servicing, plus depreciation. That wasn't one of my best buys.
My Skoda cost me £9k in depreciation over 2 3/4 years, and sold it for £15k. So it retained 62.5% of its purchase price over that time. Quite reasonable compared to many new cars. When it was a year old I could have sold it for what I paid for it, as s/h vehicles were going for more than list due to the lead time.
To be fair, the FL's have a high resale value and 60% for 3 yr old not unusual. Your Skoda was costing you £3000 per year so by that account, my £2450 per year deprecation on my last FL was good in comparison.