You need to go in like a wrecking ball OP.
Highlight all the experience you have and tell them what you’ve been doing for three long slogging years. Make a comprehensive list of all the extra work you’ve been doing. Go through it item by sodding item untill their eyes roll back in their heads. Year by year and job by job. Be persistent in blowing your own trumpet.
Personally, I always feel it’s a good idea to let any boss know how you’ve been going above and beyond the call of duty as it’s happening, and to constantly ask for a raise every month or so as you’ve been doing more work etc.
Men bosses respond very well I find to demands for more money. In a way money is the way they keep score. If you’ve been doing all this extra work for nothing, without letting them know, well, you've learned a valueable lesson, but this needs to stop now.
Don’t hide your light under a bushel girl.
Tell the world how great you are and demand twice the money, if you’re doing all that extra work.
It’s always worked for me, but then I have more chips on my shoulder and balls that most men I know.
You need to put your dukes up and fight for that job. Use your head. Keep you voice low. Pause often, with meaningful glances, and don’t get sidetracked or let anyone interrupt you. Whatever you do, don’t take no for an answer. Bring supporting material into any interview.
If you don’t get the job, threaten them with constructive dismissal. Contact an employment solicitor.
Keep a record of all the shit you’re going through. All comments and gripes made by all the boys. Tell them they have made it difficult for you to be the boss because of all the bitching. Let the boss know that some of the lazy men have told you to your face they won’t have you as boss.
Demand 100% support from management, and retraining for those sexist pigs.
Add another 20% onto the salary.
All this is to be negotiated at the interview. Call their bluff. Be ready to say No and walk.
Personally, I’d look elsewhere. It sounds too toxic.
Contact a recruitment agency with all you extra skills added to your resumé, and finally, get an agent to negotiate a much better remuneration package.
Demand a very, very good redundancy package. Tell them you’ll work for them as a consultant at a much higher day rate if they find the men don’t pick up the slack like you did, untill they’ve got someone good enough who doesn’t mind the toxic atmosphere and laziness.
This gives you time untill you’ve found something else where you’re supported and there’s clear progression and support for you and other women.
Keep us posted.