Try a lightly glassed surfboard and see the dents in those

Some manufacturers boards are less prone to compressions and some just are not too great....but most will indent a wee bit over time. So much depends on the blank and glossing and any reinforcements.
Had a Gong which compressed way too much for my liking....especially when you compare it to a Jimmy Lewis...not a compression so far at all. My JP Aus has light compressions but I have had it for two years. Fanatic compressed a little too....all were fine though.