The PayPal redirect (login/account creation) issue you're experiencing is actually a PayPal configuration problem, not an Odoo issue. Here's how to fix it:

Fix 1: Enable PayPal Guest Checkout (most important)

In your PayPal business account settings:

1. Log in to PayPal → Settings → Account Settings
2. Go to Website payments → Website preferences
3. Set PayPal Account Optional = ON

This allows customers to pay with a credit/debit card without creating a PayPal account.

Fix 2: Use PayPal's "Pay Now" button style

In PayPal settings, make sure your checkout is configured as "Buy Now" or "Pay Now" rather than requiring login.

Fix 3: Consider alternative payment providers for Ecuador

For Odoo v17 in Latin America, consider:

• Stripe (supports Ecuador and allows card payment without PayPal account)
• Mercado Pago (popular in LATAM and integrates with Odoo 17)
• PayU (available in Ecuador)

These can be set up via Website → Configuration → Payment Providers.

Important: There is no way to embed PayPal's card form directly inside Odoo without redirect — PayPal's standard integration always redirects to PayPal's domain for security. Using PayPal's Guest Checkout option is the standard solution to avoid forcing account creation.