Your playing style dictates what your tip shape should be. Trying to force a different shape just goes through a lot of tips. For starters, shape your tip or have someone shape your tip to a nickel profile if you don't have anything to gauge with.
Reduce the amount of spin you are using by 50%. This is just a baseline, you can see where you need to go from here.
You are probably hitting too hard too. Move the cue ball the least you can to get the result you want.
Over a little time your tip will either stay the same or move towards a dime or quarter profile. Usually somewhere around that nickel is fine. Once I decided I would play with a dime tip. I cut away a high dollar layered tip in a month! No matter how hard I tried, or tried to get the tip to seat in, it wouldn't hold a dime!
Next tip, I started at a nickel and let it dictate the shape it wanted. My tips are shaped between a nickel and a quarter now and I don't agonize over the exact radius. Miscues are extremely rare as are tip replacements.
A final thing, don't try to keep your tip looking like new! A tiny bit of bulge, mushrooming, ain't the end of the world. Not talking a huge bulge here, just don't try to keep the line of the tip perfectly the same as the ferrule.
The tip will let you know what it wants if you watch it. What it wants depends on your playing style. Very few people need a dime tip. They are pretty elite players so they are copied. Results in a lot of people fighting with their equipment.
Hu