SendGrid alternative for transactional email?

Our main use case: Sending large numbers of notifications and reports to enterprise customers (no marketing emails).

We've had a couple of bad experiences on SendGrid related to account suspension. The latest one was a temporary suspension due to a "suspected account compromise", which turned out to be a false positive. Zero notification from SendGrid - we had to find out from customers reporting they're not getting emails. They also refuse to give any details on why it was suspended. They're basically saying "we fucked up, and we reserve the right to continue doing so".

Are there any good alternatives to SendGrid that does not have issues like these?

We've used AWS SES before, but it required too much overhead on our side (e.g. monitoring for bounced emails and blacklisting them). We've also had an issue there where a single large customer had a misconfiguration on their email servers, which suddenly caused a large amount of our emails to be bounced, triggering a suspension.

Asking here because you don't get a view on these type of issues by comparing features - only with hard-learned experiences by yourself or others.