Just prefacing that I only saw snippets of the game and didn't see the whole performance and I can't make a judgement but it sounds from the comments here it was the usual.
It isn't a bit of, it is a complete chicken and egg scenario. Martial doesn't get service because his movement is terrible, his movement is terrible and he doesn't get service. There are days when we can be hemmed in and you can legitimately say "okay the service was bad" but when Martial is up front I think I'm more inclined to favour the attacking players and absolve them, rather than absolve Martial because the so-called "service" was bad. I don't think his application levels have earned him enough credit for that.
His movement off the ball and general all-around box poaching play has always been bad since he's been here. I think it has become more evident just how bad his general movement in the opponents half has been over the last couple of seasons now that it is getting to crunch time in his career and his salary means he has little to strive for anymore in terms of pedigree. Even with the purple patch which displayed that his hold up play had improved immensely but not nessecarily his movement nor his link up play.
My mood has kind of crossed over for him now, I nearly pity him and want him to blast some goals in for a confidence boost but you can tell he isn't busting his arse to score goals and if he was, he would get way less shit from the fans. For me it still goes back to the "I don't really wanna watch it anymore" (as someone mentioned). It can be good and it can be bad and even when people say "he has a lot of talent" personally I don't really see the talent. Talent is about making things happen despite it all being up against you, about something special. This whole thing clearly isn't working for him, I still feel like a couple of goals might spur on a flood of goals to close out the season, but this has been a completely wretched and unacceptable season for him even if he goes on a tear from here.
I'll be the same as I was at the back end of last season; "I do not trust that guy up front, be wary going into the season with him as our main striker." Which.. For whatever it is worth is a "who knows what to do with that one" type scenario at club/board/transfer level.