My bikeposts were well received and I plan to do more, but I'd like to reach out as to whether there's a topic or maybe specific questions about the whole ordeal that interests the users of this site specifically?
Like do you want to learn about tools you need for more than basic maintenance? Tips on riding in winter conditions and/or in the street with car traffic? Maybe which of the marketing buzzwords are actually important? How to train for longer rides? How to bike commute / when to bike commute?
Hit me up, I'll try to answer any question and/or do another bikepost about any topics that you're interested in and I feel qualified to answer.
To add what the other posts say, if you have internal gearing those could be out of alignment and cause you to skip a bit as the planetary gears don't mesh well.
Or maybe the teeth on your cogs are done for. If they look like sharks teeth, it's time to replace them. Look up what a fresh tooth on a cassette looks like and compare to your bike.
At that point you probably want to try two different type of locks. It's all about making your bike harder to steal than the next one, unfortunately.
Maybe give S heldon Browns locking technique a go to secure both the rear wheel and frame with one mini U-Lock, then use the chain for the front wheel.
Also his advice on making your bike look shittier on the parts that don't impact the ride is fairly solid.
A last hail mary could be to make your bike stand out. Make it a goofy combination of colours, splashy paint job or anything. This sort of depends on whether the cops actually give a shit about the problem, but it could make a thieve choose another bike that stands out less for fear of getting caught.