Often only if you are prepared to go as far as CEDR/MCOL.
European airlines are not forthcoming with that compensation /at all/. They have entire teams, procedures, policies, strategies etc to avoid paying out
I will say I expected Ryanair to be more awkward about it but apart from a few discouraging messages on the claim form (“are you sure you’re entitled to compensation?” and “most claims aren’t successful” type stuff), once I did fill out the form they paid out quickly and without fuss, despite the payout being larger than the original fare
Fair enough. It's mostly the 'bigger' long-haul airlines I've seen complaints about. But I can also find anecdata about Ryanair too without much effort: