What should be my new goal?

That is a fine team.

Do not feel bad about what you have maxed in the past, we have all made regretful investments and sometimes they have been made bad investments by the game and not our careful planning. It is just the way it goes.

I do not know what you HAVE to max out now unless there is something you are specifically lacking the firepower to do.

Another Tyranitar would be nice for Mewtwo since he destroys him in so many of his movesets and does well even in those that he is hard countered by.

Plus he is a good generalist. But you already have two I see so maybe you don't want more.

Shoot for obtaining as many good movesets that each species has access to, incase they Go legacy!

I'd say add a couple more TTs and Dnites if you can, and you have no straight Psychic-- obviously you could wait for Mewtwo, but Alakazam and Espeon are both great. Maybe add another Golem too, but you have some really useful stuff, I wouldn't be too regretful. Don't worry about the past.

Your new goal should take a break my dude. Seriously, play more casual for a bit. Just do a stop a day, catch a day. How many total 100% pokemon do you have?

I wouldn't focus on maxing pokemon we are still in a Stardust drought you will only disappoint yourself going out 2 hours a day, catching 200 pokemon for only like 22k stardust and hatching a egg (unless you have a lot of money to blow on incubators) I'd say right now just have fun catching pokemon until an update fixes the drought.

Wow, that is an impressive team and it represents more stardust than I've had in my entire time playing this game. Looks to me like you've got all your bases covered. From here you'd be just investing in luxury items.

Although I'm not sure what your reserve is but Generation 3 is likely less than 3 months away. Loads of dragons and Slaking.

Were I you I would go for a 3rd Machamp (I'm sitting at 3 maxed Machamp myself).
If you have 3, you don't need to revive Machamps when taking down a standard high end gym (consisting of Blissey, Snorlax, one of Lapras/Chansey). That will speed up the process by a little bit.

Jynx. Fastest dragonite killer.
And why no Lapras?

If you feel like you have enough good mons for raids as is, then save for gen 3. Might not sound fun, but I think it's the best advice anyone will give you. Unless you feel kike you still have some significant needs for raiding legendaries/Mewtwo, but it looks like you're fine to me.

Oh and also were is your maxed out Scizor!? It's great to have one of those and is a good investment because he will have a mega evolution.

Make your goal to become the greatest pokemon mastur

I have been asking myself what's next as well - just keep catching pokemons - maybe try getting all the bosses with just Razz Berries - Have been trying to do that with all the birds.