Yes that was me. I had a very high maintenance baby who cried all the time, despite my very best efforts.
He was miserable because he couldn't crawl, then when he could crawl, he was miserable that he couldn't walk, then talk etc! A VERY frustrating time for him and us.
Like you, I hated every day, my stomach would be in knots, I started having panic attacks - god it was awful, you really do have my sympathy.
On a positive note - YES, it absolutely gets better. I cannot emphasise this enough. Mine is almost 4 now and is just a total pleasure to be around.
The early years are so damn hard, especially if you have no help. You panic, thinking "this is it, forever" but it really isn't the case. Yes, there will be some tough times ahead, but just try and ride it out as best you can.
A few things that helped me: wearing foam earplugs during the day to dampen the noise of a screaming baby/toddler. Play music, try and get out for some fresh air every day, accept help from whatever source, try and have a shower every day, I would often go days without showering because I was so stressed and didn't have time (baby can be contained in a playpen/jumperoo if need be), go to groups if you can bare it!