DDOS only affecting some users

Hello, I have a gaming community which is reaching 200-400 online users every night.
We are getting DDOSed several times a week, but the DDOS is somehow only affecting some users.
It will drop from 400 members to 200 and only people joining after that will be affected by loss, members who were on the server before DDOS attack started are rarely affected.
I’m using OVH host.
It will keep dropping new members who try to join, here’s some logs:

23/02/2024 22:01:09 VirtualServerBase Info file download from (id:0), ‘/icon_97104353’ by client ‘123aaaa’(id:51307)
23/02/2024 22:01:09 VirtualServerBase Info client disconnected ‘TeamSpeakUser64’(id:51306) reason ‘reasonmsg=leaving’
23/02/2024 22:01:14 PktHandler Info Cleaning up connection because of 9 resends of COMMAND packet
23/02/2024 22:01:14 PktHandler Info Dropping client 27271 because of resend timeout
23/02/2024 22:01:14 PktHandler Info Cleaning up connection because of 9 resends of COMMAND packet
23/02/2024 22:01:14 PktHandler Info Dropping client 27272 because of resend timeout
23/02/2024 22:01:14 PktHandler Info Cleaning up connection because of 9 resends of COMMAND packet
23/02/2024 22:01:14 PktHandler Info Dropping client 27273 because of resend timeout
23/02/2024 22:01:14 VirtualServerBase Info client disconnected ‘TeamSpeakUser41’(id:51242) reason ‘reasonmsg=connection lost’
23/02/2024 22:01:14 VirtualServerBase Info client disconnected ‘TeamSpeakUser101’(id:51217) reason ‘reasonmsg=connection lost’
23/02/2024 22:01:14 VirtualServerBase Info client disconnected ‘TeamSpeakUser91’(id:51208) reason ‘reasonmsg=connection lost’

Is there a way I can stop these attacks?