Yeah it seems like your biggest
weakness is your removal. I would also maybe invest some card slots to protecting the commander since some of your cards seem pretty pointless without him out (
Lightning Greaves,
Swiftfoot Boots, etc).
Lightning Bolt,
Magma Jet, and
Spell Shrivel are all not what you want to be doing in this deck imo. For creature removal you can look into
Reality Shift,
Pongify, and
Rapid Hybridization. Obviously
Beast Within always deserves a mention as everything removal. It's very important to have artifact and enchantment removal too,
Krosan Grip,
Return to Nature,
Nature's Claim are some options off the top of my head.
Reclamation Sage is a creature that does the job too.
For counterspells, yeah you can run them if you want, they're the only things that can stop some annoying ETBs or non permanent spells. I wouldn't run
Spell Shrivel though, some you might consider are
Mystic Snake,
Frilled Mystic,
Disallow,
Voidslime,
Swan Song, and even just straight-up
Counterspell.
Disallow and
Voidslime can counter
anything, even activated abilities and cast triggers which normally can't be interacted with.
BTW I love the little interaction
Ancestral Statue has with Animar, it's cool how it's useful to put infinite counters on it and it also can just randomly win if you have
Impact Tremors & friends and they don't have a
counterspell or instant speed removal.