That doesn’t sound like a great experience. The limits aren’t hidden but I expect they do catch some new users like yourself out.
You can view the limits in your app’s setting & here https://monzo.com/terms/#charges.
After you’ve used the card for more than 2 months, you can ask the customer support team to increase your limits.
Edit
But as Ian mentions below, in the meantime you can get yourself verified. I expect that’s what the support team told you. You might not have been able to complete that process immediately but that’s not the same as Monzo “being no help”. It would be good to see their response.