The brutal shift in user expectations the second you put up a paywall

When your software is free, users will gladly ignore a broken button or a slightly confusing layout. But as soon as you start charging even $5 a month, the grace period ends instantly. Suddenly, tiny glitches that no one cared about before become urgent refund requests. We noticed people stop treating the product like a fun tool to try out and start judging it strictly by the time or money it saves them. For those who switched from free to paid how did you handle that sudden jump in customer support demands?