I reject all AI trade offers by reflex at this point.
The crappy UI made me to adapt my trading patterns: nowadays I do all my trades with all known AIs within 1 turn every 30 turns, selling my copies of luxuries for gpt and buying their copies and open borders for single payments only, so that the UI induced pain would be limited as much as possible and I had peace of mind for 29 further turns.
If I want great works of art or strategic resources, I go and look for them myself whenever I need them, paying single payments, never gpt, so that those odd gpt deals would not clutter the cash flows tooltip. I sell my strategic resources or some DF to the AI needing them for single payments as well, as a means of quickly raising funds for immediate cash needs, never gpt for the above reasons.
The AI may get lost with their offers, they routinely offer silly terms or come at a bad time, like with invitations to make some inconvenient joint wars.
However, I must pay triple attention when there's an Aid Emergency ongoing with myself as the target. The UI and wording for their cash support is exactly the same as when they ask for something, so there's a real danger to reject the free money they're giving to you