For me tripods come in 3 broad categories:
1. el cheapo: aluminum lightweights with plastic heads.
2. Middle of the road: consumer to prosumer aluminum and some cheaper carbon fibre tripods with detachable heads so you can put on a ball head or pan and tilt or whatever. A decent one of these from whichever brand will serve the purpose for 90% of circumstances IMO. There is plenty of online advice inc here to fine tune the choice according to features, weight, height etc etc.
3. Top end. Where 2 ends and the need for 3 begins is very much up to circumstance. One thing I can mention is that the stated load capacity for tripods is mostly meaningless. Its
rigidity that counts.
Sounds like you have found out your category 1 tripod (according to spec online, a typical lightweight with plastic head) and need to migrate to a 2. I use two tripods. My 2 is an old Aluminum Diawa with 4 section legs with a cheap slik p&t head, does the job for 90% of everything including for example most of the lens testing on
this page. My 3 is a massive old weighty slik SL67 that I trundle out occasionally to use eg with my 6lb 200-500mm tamron. Both were off ebay, one for $10 the other for $20!
I recommend trying out before you buy. Look particularly for smooth and easy movement of lens + camera. Check out how much give and vibration and "boiiing" there seems to be with the camera + lens on the tripod. And a particular point: err on the side of one that you will actually carry around and use! The other one might be sturdier/stronger/prettier... but if its just a bit too large/bit too heavy/whatever so you end up leaving it behind; it's no good!
My big tamron on my big ol Slik. Note use of a macro rail to balance the lens, and a wood wedge to broaden the support point. trcks of the trade... ( I have been thinking about getting a gimbal head to use with this lens for a good while ...)