I don't know your shot schedule but I do once a week and have never felt a hormone shift. I've heard of guys who take their injections once every 2 weeks or more can have the "withdrawal" but I think it's much less common for guys who inject weekly. You should ask your endo about that. Yeah, you have to inject more often but you reduce the chance of the hormone roller coaster.
As for your mother, I'm very sorry about that. I hate to say it but I don't think she will change. People like that rarely do, plus the fact that she
doesn't want to change means she won't. People like her are never happy or satisfied. I've had to deal with people like this before so I know what it's like. You might just have to cut ties with her. I know you want your children to see their grandmother, but wouldn't that just expose them to what you were exposed to as a child? They'd be exposed to her toxicity you grew up with. Plus, with the current situations it might get worse. I think it's right for you and your partner to be concerned about what she tells them when alone. I've seen that before too. It can end really, really bad. She may even try to get custody of them and refuse visitation rights if she sees you as "a bad influence". It's your mother and family, and you know more than I do and know how to handle them, but I ask you to please be careful. This situation could turn out really, really badly for many involved.
After looking at your new avatar I can see a difference already on T. You'll get there. It takes time. The wait sucks, but it will happen. 🙂 I can't say much about the gay bar thing since I don't go to them, but if you're around people who seem to be very transphobic then be careful. Hopefully it would never end in violence but you never know. It seems these guys hate anything and everything about women. Even though you're a guy they'll probably see you as strictly a woman because of your body. With their mindset they may then shun you, want you to leave or at worse result to violence. Be careful about these situations. People are becoming more understanding of transsexuals but there are still alot of transphobics out there so you have to be mindful.
Wow, this reply seems like a downer. Here, have a smile.

Things will get better.