@Bakersdelight take this as an example. In respectful marriages, bills are usually paid proportionally according to earnings.
So you earn £20K, he earns 60K
Your mortgage is £500, your other living expenses are £1500 = £2000 per month.
You contribute £500, he contributes £1500, monthly.
It's absolutely not normal or fair in decent marriages for one person to be financially struggling, whilst the other is accumulating a nice savings pot in their sole name. This is a red flag for financial abuse.
Your DH has an extremely unfair mindset as it leaves you in hardship. He's building wealth, whilst you're financially insecure.
If your DH cannot immediately adjust his mindset (it may just be that he lacks understanding or is immature), then once he's adjusted his mindset, your marriage can hopefully improve. However, if he does not care that this is unfair, and insists that this is how it is to be, then this really does cross the threshold of financial abuse because it is creating an unequal, coercive dynamic.