Use US LTE with 0 fraudscore. 
Login on checkout never login into paypal itself that causes 2fa and locks the account.

Use phone, duckduckgo browser, type everything slowly like you are grandpa, after hit just press fire emoji, check your fraud score.

2FA:
0 fraudscore/usa ip or proxies
always use express

GENERIC:
get better site
or get better proxies/switch lte carrier