Yeah some more info would be helpful:
1. Type of mouse and drivers if applicable.
2. Have you tried using a different mouse to see if the mouse itself is just bad?
3. In windows, what is the mouse sensitivity set to?
4. What senstivity have you set the mouse to in the game options?
EDIT: If...
Sure lots of pubs suck, but there are good ones also, you just have to get involved with the active community to find them. You don't have to play competitively to have ggs.
There are loads of maps with few props. The community is working towards developing better balanced maps with fewer props than overwatch and lockdown also.
It depends on your skill level. Good players don't have a problem with grav nades as cooking them takes time and you risk getting killed while doing so, and they can be caught and returned or evaded.
Animations are only bad if someone intentionally exploits duck-jumping.
You are correct, it has seen a resurgence lately. Some of the community are working to increase numbers further. There is a lot more to this game than meets the eye, but unfortunately most people don't play long enough to experience it. :cheers:
This may help some...
http://www.hl2dm-university.com/hl2dm_102.htm
If all else fails, put the following switch in your launch options:
-console
Then you can bind it to a new key:
bind p toggleconsole
In autoexec:
bind "p" "toggleconsole"