Also using fan voted player of the month award is extremely faulty because they don't say much. Heck Martial didn't win this month player of the month when objectively he should have won it. The award is hugely favorable for new signings and academy players, it's as simple as that. James, Ighalo, Williams, Bruno, Greenwood, McTomminay all fit that category.
People questioning his consistency and throwing the bias opinions couldn't be any more wrong. Consistency wise, Matial has been our most consistent player this year. He's literally only had a single bad month(January) while he's performed at the respectable level at
AT LEAST throughout the rest of the months, no other player can have that claim. And I'll break it down to prove this point.
Start of the season Martial starts in fine form in his first 3 games. 2 goals and an assists plus good overall play. He gets injured and sidelined for 2 months.
While he's out we stank up the place and showed our worst form of the season. We went a whole month of football scoring only once in the league. Everyone completely awful and the Rashford detractors reach an all time high. Rashford forced to play as a striker and was quite terrible during that period which lead to him being questioned. Unfortunately those are 2 months he'd love to forget.
Martial finally comes back from injury after 2 months and our game picks up a bit. Rashford restored as an inside forward and he started his blossoming run of the season. By then Rashford indisputably became our best player while Martial himself was one of our better performer and important player but not quite as good as Rashford who was imply in sublime form. At that time we saw the importance of Martial link up play and helping in the midfield because Lingard and Perreira were utterly hopeless. His presence and play was valuable and important in unlocking Rashford and give us any semblance of trying to play decent football even though we were still quite inconsistent as a team.
Came December, Martial has a better month than November(the month he came back after his injury but was integral for us) with games like the Newcastle one as highlight. Now this is practically the first part of the season where he wasn't poor and hadn't had a stinker of a month. After a great start, he unfortunately picked up an injury which sidelined him for 2 months and we played some of the most horrible football ever. Then he came back and helped us play better which also helped Rashford unlock. Decent first half of the season.
Now comes January where he finally got his stinker of a month. This period was quite terrible for us with defeats against Liverpool and the final blow being a defeat against Burnley at home. In that period Martial squandered a great chance against Liverpool(thought he created it) and was quite terrible against Burnley. This month was easily the one were he put a stinker of a month.
Now comes February and we have Bruno. Things finally picks up, we start stringing a bunch of good performance and the start of our unbeaten run which last until our defeat to Chelsea in the FA cup semi final. From this point on Martial becomes a more consistent goal scorer. He doesn't go 2 games he start without scoring almost. Bruno at this point is clearly the best player in the team but Martial is also among our best performer. He's consistently contributing but because he just came out of a bad month and all the love the Caf could muster was going to Bruno, some people just didn't realize how consistently well Martial was already performing.
People were still so bias against Martial that they refused to acknowledge anything he did. In that period he scored in big games such as Chelsea and City wins yet the talks were always all about Bruno. Martial still got criticized even after those games. His volley against City was hardly talked about while the pass from Bruno got all the attention(the volley was harder to execute than the chip pass by Bruno). He got rated average by loads of Caftards in that City game because he didn't square a ball to Bruno and choose to go for goal himself instead.
At this point people are still talking about him being inconsistent, he's still being criticized for some reasons. Meanwhile by this point starting from February he's already put in a run of consistent performances but for one reason or another it's not perceived this way yet. Of course Bruno is the best player during this run but Martial is also having a great run but not being noticed.
Post lock down Martial carries on his great run and remained consistent to the very end while Bruno tailed off in our last game hence why Martial has been more consistent than Bruno since the latter arrival.
Now if you look at the whole season, beside January Martial has had a consistent season. Talks about recency bias couldn't be further from the truth. He's put together a consistent season hence why he deserves POTY, nothing to do with recency bias. Just because some people refused to notice his consistency in past months until recently doesn't mean his consistency this year didn't happen.
Also
@Web of Bissaka , since you like stats, here are non bias ones. Martial is our only player that has made the WhoScored team of the season for the PL. That shows his consistency this season, especially compared to the rest of his peer at United. Fan awards doesn't give accurate representation of deserving winners(Martial just lost this July one which should tell you everything you need to know about fan awards).