NEW Player. Titan build squishy and slow.

I am level 87 and when I play with my buddy on 14/15 tier maps i will get one shot. So much is going on and I can't tell what is killing me. My movement speed is way to slow as well so when I do stampede it takes forever to get moving. Any pro tips for a new guy. Thank you.

You need to show your build. Give a link to your path of building.
If you do not know how - google it.

With a link to your character, we can almost instantly tell you what to do to fix it.

Otherwise you will hear tons of general bullshit that may mislead you in the wrong direction.