What’s the alternative at this point?
I can’t see a single argument to the tune of Martial is amazing; let’s keep him no matter what as is implied.
The reality is that the only strikers at the club are Ronaldo, who is 37, and Rashford, who isn’t really a striker. Martial, whether you like him or not, is still a player on our books who does, in spite of how bad things have been recently, have enough about him to come in and do some kind of job.
If Harry Kane or Haaland were on their way into the club then by all means send him on his way, but that isn’t happening. I think Ten Hag is going to have to try and make this work.