Yes, it will get lots easier. Soon.
My first baby was hard work in the ways you describe. It's just exhausting.
We also combi fed and I put a lot of pressure on myself to try and increase the breast vs formula proportion. It never happened, but I did combi feed from 3 days until 6 months, constantly feeling guilty.
Around 8 weeks was a turning point - I managed to understand baby a bit better and baby started to develop a bit of a pattern around sleeping / eating, so it was easier to figure what the fussing was about.
My second baby is now 6 weeks and this time round it's been a lot easier. Things I've learnt are:
1- Don't put too much pressure on yourself around formula / breast. Baby will turn out perfectly well and healthy either way.
2 - Make sure you are looking after yourself as well. It's natural when baby is crying to hold them, even though you haven't had a drink for hours / are busting for the loo. Make sure you are comfortable too - if you are settled on the sofa/bed with a drink next to you and a good program on TV feeding / being up half the night isn't quite so arduous. So take 3 or 4 minutes to get everything close by (even if baby if crying)
3 - Do whatever you can to make life easier. Batch make a days worth of bottles / or use pre-made in the night, rather than make each up individually. Even simple stuff like buying pre-grated cheese.
4 - Use a sling. Baby often happy and you can at least move around and do stuff. With any luck they'll fall into a deep sleep and you can transfer them to bed and get some sleep yourself.
Things will get lots easier soon