I understand that you're fairly new to PD, but Lain was often a high roller on PD2 and did in fact wager a large amount. I don't think it is unreasonable to be upset by an error on PD's side that could have cost him a lot of money.
Thanks for some of the support from a few people here, I understand fundamentally this is a matter of opinion it just depends with whom you place the empathy.