The DM has an emerging pattern of having a likely unconscious biased against the AFAB Nonbinary players and Lady players with NPC S/Os
Edit: *Unconscious bias
Hi, so I recently put two and two together with a pattern in a campaign I'm in. To give a background, this campaign started on a bad note for this DM. A male DM who broke up with his GF right at the start of the campaign where they broke up and she got together with someone who the DM thought he was bros with. (Which actually put the start of the campaign on a halt for a month or so while he tried getting over his breakup.)
In the campaign, there are 4 PCs with NPC partners. Two NB players (myself included in the two), a lady player, and a lad player. For a good few 10+ sessions it was alright since the romance wasn't the main focus of what was going on in session.
Then the lad's NPC S/O came into the view. The first NPC s/o who appeared and greeted the party within the first 10 sessions. She is considered really important and well respected in the setting. She is also severely obsessed with the PC (I'll call him Bus) to murderous levels. She causes a bit of focus on the romance aspect for the campaign down the line. Bus eventually ends up getting the NPC pregnant and will be getting married sometime in the campaign. She disappears here and there but she is constantly a big part of the party. Hanging around and giving basically free info on what she can gather as a sort of info broker who'll do it for free since Bus is there.
The DM also has a couple of prominent male NPCs with prominent S/Os who are happy with their partners. One very prominent NPC to the party in particular, who is bordering on self-insert DMPC at this point since it was clear he had levels, is getting a wish fulfillment sort of situation. This NPC, I'll call Tie, has a smith after him, an all very powerful witch after him, along with basically this DM's favorite character from a show. Who will likely fight the powerful witch lady who is getting jealous to get with him. This happened around the 13-21th session mark.
Then we move to the AFABs and Lady Players.
When we reach the 25th and onwards, the two AFABs have their spouses kidnapped like it was nothing, almost no hint of resistance despite also being strong. Along with how my PC has to fight off another NPC who wants to claim my PC's s/o as their own. Barely any time with the PCs, and if they did, they leave immediately and have a very low chance of coming back compared to Bus and his NPC s/o. Barely any respect compared to Bus' NPC and the DM's NPCs.
The lady player had to hear her PC's fiancée be emotionally tormented and mentally manipulated. To the point that it made this player cry in their first session and first time being in a campaign too, mind you.
With that in mind, how do I put it gently to the DM that I think he's carrying some unconscious biases and that it's kind of showing in sessions?