Hi List
The main problem I observed with OVH and abuse from their network in the past years, is that the did NOT monitor their abuse-desk email addresses. I did not send emails to them them lately, so maybe that has changed in the meantime.
They required you to fill out an abuse complaint form on their website, which is not useful for automated reports generated by tools like fail2ban or spamtraps.
I didn't observe a lot of abuse from their network lately, but in the past it took some effort to get someone @ OVH to look at issues.