What should I buy?

LMa2000

Hello, I know that this is a personal choice but I'm really not sure what phone I should buy. I'm choosing between samsung galaxy A50 and oneplus 7pro. I've never spent more on a phone that 300 euros. The oneplus cost like 750 euros and the A50 300 euros. I hate lag on my phone, I want it to be fast. I'm not a gamer, the games I play at the moment are angry birds and merge dragons. I would like that my phone's battery last trough the day. And I want a good camera but I'm not a photographer so it doesn't need to be perfect.
I hope you can help me decide and sorry for the long tekst